What AI recommends for JavaScript web application

Here are quick ways to turn JavaScript on in the major browsers. If you tell me your exact browser and device (e.g., Chrome on Windows, Safari on iPhone), I’ll tailor it precisely.

• Google Chrome (desktop)
• Menu (⋮) > Settings > Privacy and security > Site settings > Content > JavaScript > Allowed (recommended). (support.google.com)

• Microsoft Edge (desktop)
• Menu (⋯) > Settings > Cookies and site permissions > JavaScript > Allow. (support.microsoft.com)

• Mozilla Firefox (desktop)
• Firefox enables JavaScript by default. If something disabled it, re-enable via about:config by setting javascript.enabled to true, or disable/adjust any extensions that block JS. (support.mozilla.org)

• Apple Safari (macOS)
• Safari > Settings (or Preferences) > Security > check “Enable JavaScript.” (support.apple.com)

• Safari on iPhone/iPad
• Typically: Settings > Safari > Advanced > JavaScript (toggle on).
• On some recent iOS versions, you may see it under Settings > Apps > Safari > Advanced > JavaScript. (support.google.com)

Tip: If a single site still says “JavaScript is blocked,” check that site’s specific permissions (click the lock icon in the address bar and look for JavaScript under Site settings/Permissions). (learn.microsoft.com)

Which browser and device are you using?

To enable JavaScript, open your browser’s Settings and turn on JavaScript under Site settings or Privacy/site permissions.¹²⁴ The exact path depends on your browser, but the setting is usually called “Sites can use JavaScript” or “Allowed.”²⁴⁶

• Chrome: Settings → Privacy and security → Site settings → JavaScript → select Sites can use JavaScript.²⁴⁶
• Microsoft Edge: Settings → Cookies and site permissions or Privacy, search, and services → JavaScript → turn it to Allowed.¹²⁸⁹
• Firefox: type about:config in the address bar, search for javascript.enabled, and make sure it is set to true.³¹⁰¹⁴
• Safari: open Safari Settings/Preferences → Security → check Enable JavaScript.³⁸¹⁰
• Reload the page after changing the setting.¹²⁴

If JavaScript still does not work, check whether an extension or privacy blocker is disabling scripts, since those can override the browser setting.³¹⁶

Here is how to enable JavaScript across the most common web browsers:

Google Chrome

On Desktop (Windows / Mac):

• 1.Click the three vertical dots (menu) in the upper-right corner and select Settings.
• 2.In the left sidebar, click Privacy and security.
• 3.Click Site settings.
• 4.Scroll down to the Content section and click JavaScript.
• 5.Select Sites can use Javascript.

On Android:

• 1.Open Chrome and tap the three dots in the top right.
• 2.Tap Settings > Site settings.
• 3.Tap JavaScript and toggle the switch On.

Apple Safari

On Mac:

• 1.Open Safari. In the top menu bar, click Safari > Settings (or Preferences on older macOS versions).
• 2.Click the Security tab at the top.
• 3.Check the box next to Enable JavaScript.

On iPhone / iPad:

• 1.Open your device's Settings app.
• 2.Scroll down and tap Safari (Note: On iOS 18+, go to Settings > Apps > Safari).
• 3.Scroll all the way to the bottom and tap Advanced.
• 4.Toggle the switch next to JavaScript to On (green).

Microsoft Edge

• 1.Click the three horizontal dots in the upper-right corner and select Settings.
• 2.In the left menu, select Cookies and site permissions.
• 3.Under the All permissions section, click JavaScript.
• 4.Turn on the toggle next to Allowed (recommended).

Mozilla Firefox

Note: In modern versions of Firefox, JavaScript is enabled by default and cannot be changed through the standard menu.

• 1.In the address bar, type about:config and press Enter.
• 2.Click Accept the Risk and Continue.
• 3.In the search box at the top, type javascript.enabled.
• 4.If the value is set to false, click the Toggle button (or double-click the row) to change it to true.

Tip: After enabling JavaScript, refresh any web pages you currently have open for the changes to take effect.

JavaScript is enabled by default in every modern browser, so if a site is telling you it's disabled, the cause is usually a per-site permission, a script-blocking extension, or a privacy setting rather than a global toggle (wikihow.com). Start with the site-level check, then fall back to the global setting.

Chrome (desktop)

• 1.Click the three-dot menu (⋮) in the top-right → Settings
• 2.Privacy and security → Site Settings
• 3.Scroll to JavaScript and select Sites can use JavaScript

wikihow.com · w3schools.tech

Faster fix: click the lock icon in the address bar on the broken site → Site settings → set JavaScript to Allow → reload (testyourbrowser.com).

Chrome on Android

⋮ → Settings → Site settings → JavaScript → tap the switch on (wikihow.com).

Microsoft Edge

• 1.Three-dot menu → Settings
• 2.Cookies and site permissions → JavaScript
• 3.Turn on Allowed (recommended)

You can also reach it via Privacy, search, and services → Site permissions → All permissions → JavaScript (testyourbrowser.com · wikihow.com).

Firefox (desktop)

Firefox has no ordinary per-site JavaScript toggle, so you edit the config flag:

• 1.Type about:config in the address bar and press Enter
• 2.Accept the risk warning if prompted
• 3.Search for javascript.enabled
• 4.Make sure it reads true (click the toggle if it says false)

w3schools.tech · wikihow.com

On Firefox for Android, iPhone, and iPad, JavaScript can't be disabled at all — it's always on (wikihow.com).

Safari on macOS

Safari → Settings → Security → check Enable JavaScript, then refresh or restart Safari (w3schools.tech · wikihow.com).

Safari doesn't offer a normal per-site JavaScript toggle, so this global switch is your only option (testyourbrowser.com).

Safari on iPhone / iPad

Settings app → Safari → Advanced → JavaScript → toggle on, then close and reopen Safari (testyourbrowser.com · wikihow.com).

Opera and Brave

Both follow the Chrome layout:

• Opera: Settings → Advanced → Privacy & security → Site Settings → JavaScript
• Brave: Settings → Additional settings → Privacy and security → JavaScript

w3schools.tech

If it's still broken

The global toggle is often not the real problem. Check these in order (testyourbrowser.com):

• Extensions: NoScript, Ghostery, Script Blocker Ultimate, and uBlock Origin's strict modes block scripts even when JavaScript is enabled. Test in Incognito/InPrivate — if the site works there, re-enable extensions one at a time to find the culprit, or add an allowlist rule.
• Privacy/tracking protection: In Firefox, set Enhanced Tracking Protection to Standard for testing. In Safari, disable Content Blockers via the aA menu. In Brave, lower Shields for the site.
• Network-level blocking: Try the site on a mobile hotspot. If it works, your router, DNS filter, or office proxy is blocking a required script domain — on managed networks, ask IT to allow the site's CDN domains.
• Corrupted profile: If only one browser fails, test in a second profile to rule out the profile itself.

If you're troubleshooting a bank or enterprise login, keep your changes site-scoped rather than altering global privacy settings (testyourbrowser.com).

Here's how to enable JavaScript in the most common browsers:

Google Chrome

Click Privacy and security, expand Site Settings, scroll to the Content section and click JavaScript, then under Default behavior click the "Sites can use Javascript" radio button to enable it.

Mozilla Firefox

Open Firefox, type about:config in the address bar and press Enter, then in the Search preference name field type javascript.enabled, and click the Toggle icon on the far right — the value changes from false to true to indicate JavaScript is enabled (click the Accept the Risk and Continue button first if prompted).

Microsoft Edge

Click the Edge menu (three dots) in the upper-right corner, select Settings, choose Cookies and site permissions on the left, then click the JavaScript box under Site permissions and use the toggle to enable it.

Safari

Click "Edit" on the menu and select "Preferences," then select the "Security" tab, and in that tab under "Web content" mark the "Enable JavaScript" checkbox. (On newer Safari versions, this may be under Safari > Settings > Security instead of Edit > Preferences.)

Opera

Open Opera, navigate to Privacy and security in the Settings menu and click Site settings, then click JavaScript and select "Sites can use JavaScript," and restart the browser.

Internet Explorer (if still applicable)

From the Tools menu, select Internet Options, click the Security tab, then click the Custom Level button, and scroll through the options until you see Scripting — enable "Active Scripting" there.

After enabling JavaScript, refresh the page you were trying to view for the change to take effect. If you're on a mobile device, you can enable JavaScript on Android or iPhone by going to the browser settings and following similar steps .

If you let me know which specific browser (and version) you're using, I can give you more precise, step-by-step instructions.

JavaScript is enabled by default in all major browsers. If a site says it is off, check the steps for your browser below, then reload the page.

Google Chrome (Windows, Mac, Linux)

• 1.Open Chrome and go to the three-dot menu → Settings.
• 2.Open Privacy and security → Site settings.
• 3.Under Content, select JavaScript.
• 4.Choose Sites can use JavaScript.

Shortcut: paste chrome://settings/content/javascript into the address bar.

Android: three-dot menu → Settings → Site settings → JavaScript, then turn it on. iPhone/iPad: Chrome does not offer a JavaScript switch; it stays on by default.

Microsoft Edge

• 1.Open the three-dot menu → Settings.
• 2.Open Cookies and site permissions.
• 3.Select JavaScript.
• 4.Turn on Allowed (recommended).

Shortcut: paste edge://settings/content/javascript into the address bar.

Mozilla Firefox

• 1.Type about:config in the address bar and press Enter.
• 2.Click Accept the Risk and Continue.
• 3.Search for javascript.enabled.
• 4.If it is false, toggle it to true.

Do not change other preferences on that page.

Safari

Mac: Safari menu → Settings (or Preferences on older macOS) → Security → check Enable JavaScript.

iPhone/iPad: open the Settings app → Apps → Safari → Advanced → turn on JavaScript.

If it is still blocked

• Check the JavaScript page for a site-specific exception that blocks that website, and remove it.
• Disable content blockers or extensions such as NoScript, uBlock Origin, or privacy tools that can stop scripts even when the browser setting is on.
• Try a private/incognito window to see if an extension is the cause.

A good way depends on your browser. Quick steps for the main ones:

• Chrome (Windows/Mac/Android)
• Option A (fastest on the site): open the site, click the padlock/controls icon at the left of the address bar > Site settings > JavaScript > Allow, then reload. (support.google.com)
• Option B (from settings): Settings > Privacy and security > Site settings > JavaScript. Leave the global setting as “Don’t allow,” then add the site under Allow; or keep the global “Allowed” and add the site under Block/Allow as needed. (support.google.com)

• Microsoft Edge (Windows/Mac/Android)
• Settings > Cookies and site permissions > JavaScript. Use the Allow or Block lists to add just the site you want. In managed/enterprise setups there’s also a policy (JavaScriptAllowedForUrls) for per‑site allows. (support.microsoft.com)
• Note: Edge’s “Enhance your security” feature can restrict JavaScript/JIT on unfamiliar sites; adding a site exception or turning that feature off for a site also re‑enables JS there. (support.microsoft.com)

• Firefox (Windows/Mac/Linux)
• JavaScript is on by default and Mozilla doesn’t expose a simple per‑site JS toggle in normal settings. For per‑site control, use an extension such as NoScript or uBlock Origin’s per‑site “no‑scripting” switch. Changing advanced prefs (about:config) is possible but not recommended. (support.mozilla.org)

• Safari
• macOS: JavaScript is a single global toggle in Safari > Settings > Security (or Advanced, depending on version). Safari doesn’t offer a built‑in per‑site JS on/off switch. If JS is off globally, you’ll need to turn it on for all sites. (support.apple.com)
• iPhone/iPad: JavaScript is also a global toggle in Settings > Safari > Advanced. No per‑site switch. (athenahealth.com)

If you tell me your device and browser, I can tailor the exact clicks/taps for you and help troubleshoot if it still doesn’t work.

The best way is usually to open your browser’s site permissions and allow JavaScript for that one domain only, rather than turning it on globally.¹²¹⁰

In Chrome, go to Settings → Privacy and security → Site settings → JavaScript, then either leave JavaScript enabled globally and add the site to the allowed list, or set it to block by default and allow only the specific site you want.¹⁶¹¹ Chrome also lets you change permissions from the site itself by opening the site info panel next to the address bar and choosing Site settings.¹

If you want the exact pattern for a single site, examples like *[.]example.com are supported in browser policy settings and in browser help pages that show adding site-specific allow rules.⁴⁸ In Microsoft Edge, the equivalent policy-based setting is JavaScriptAllowedForUrls**, which allows JavaScript on specific URL patterns.¹⁴

If you tell me which browser you use—Chrome, Edge, Safari, Firefox, or another one—I can give the exact clicks for that browser.

The easiest and most reliable way to turn on JavaScript for just one website (while keeping it off or controlled elsewhere) is through your browser's site-specific permissions, usually accessible right from the address bar. Here's how to do it in the most common browsers:

Google Chrome (recommended method — via address bar)

• 1.Go to the website in question.

2. Click the tune icon (sliders) or lock icon on the left side of the address bar.

3. Click Site settings.

4. Find JavaScript in the permissions list and change it from Block to Allow.

5. Reload the page.

Alternative (via Settings menu): Navigate to the JavaScript settings of Google Chrome, scroll down to the "Allowed to use JavaScript" section, click "Add," then type in the domain name or subdomain of the site you want to enable JavaScript on, and click "Add." This is useful if your global default is set to block JavaScript everywhere, since you can keep JavaScript enabled globally and only disable it for specific untrusted websites, or vice versa.

Chrome on Mobile (Android/iOS)

Click "Add Site Exception" in the same menu, then input the URL of the website that you want to allow to use JavaScript.

Microsoft Edge

Go to Settings, search for JavaScript and click on it, then click Allowed. You can also specify specific sites to enable or disable JavaScript.

Firefox

Firefox doesn't have a clean per-site toggle like Chrome — its JavaScript setting is global via about:config:

In the address bar, type about:config and press Enter, click "Accept the Risk and Continue," then in the search field type javascript.enabled, and click the Toggle icon on the far right.

This affects all sites, not just one. For per-site control in Firefox, you'd need an extension (similar to Chrome's extension option below).

Brave

Click Privacy and security → Site and Shields settings, scroll to Content and click JavaScript, select "Sites can use JavaScript," and if a single site is still broken, click the lion (Shields) icon and switch off "Block scripts" for that site.

Using an extension (any site, quickly, on demand)

If you frequently need to toggle JavaScript per-site, you can enable and disable JavaScript manually in Chrome, but it takes time, especially if you want the settings to apply only to a particular website — this is where an extension helps. A popular lightweight option is an extension that adds a one-click toggle in your toolbar for the current site only.

Bottom line: If you just need JavaScript on for one site right now, the fastest method in any Chromium-based browser (Chrome, Edge, Brave, Vivaldi) is: click the padlock/site-info icon in the address bar → Site settings → set JavaScript to Allow → reload the page. Firefox requires either the global about:config toggle or a browser extension for true per-site control.

Enabling JavaScript for a Single Site in Chrome

If JavaScript is working fine globally but blocked on one particular site, you don't need to touch your default settings — you can override the permission for just that site.

The quick method (per-site override)

• 1.Open Chrome and go to the website in question.
• 2.Click the tune icon (sliders) or lock icon to the left of the address bar.
• 3.Select Site settings.
• 4.Find JavaScript in the permissions list and change it from Block to Allow.
• 5.Reload the page — JavaScript will now run on that site only.

This is the approach recommended by enablejavascript.io, which notes that "previously saved site settings open" when you click the icon next to the web address, so you can change them without diving into Chrome's main settings menu at all.

The settings-menu method

Google's own documentation describes the same flow from the other direction:

• 1.On your computer, open Chrome.
• 2.Go to the site.
• 3.To the left of the web address, select View site information.
• 4.Select Site settings.
• 5.Change the permission setting.

Per support.google.com, your changes save automatically, and the site will use its own settings instead of your defaults. That same page also notes you can hit Reset permissions to undo your changes, and that Chrome removes permissions from sites you haven't used recently to protect your data.

Checking whether it's a site-level or global issue

The enablejavascript.io guide suggests a useful diagnostic: if another website still asks you to enable JavaScript after you've allowed this one, "check that site's permissions and any script-blocking extensions, then reload it." In other words:

• One site broken, others fine → site-level exception or an extension is blocking it.
• All sites broken → your global default has been switched to "Don't allow sites to use JavaScript" at chrome://settings/content/javascript.

A caveat about verification

Be careful about how you confirm it worked. As that guide points out, "formatted text, images, and a result in the DevTools console do not by themselves confirm that a web page's scripts ran." Reloading an interactive site like Gmail or YouTube is a more reliable real-world test.

One last note: the per-site JavaScript exception is specifically a Chrome feature. Firefox's equivalent documentation is a separate system, and Firefox doesn't offer the same granular per-site JavaScript toggle through the address-bar icon.

The easiest and most reliable way to enable JavaScript for a single website depends on the browser you are using:

Google Chrome / Microsoft Edge / Chromium Browsers

Method 1: Directly from the Address Bar (Quickest)

• 1.Navigate to the website.
• 2.Click the Site Information / Permissions icon in the address bar (it looks like a set of tuning sliders or a padlock, just to the left of the URL).
• 3.Click Site settings (or look directly for JavaScript in the menu).
• 4.Find JavaScript in the list and change the drop-down to Allow.
• 5.Return to the tab and click Reload.

Method 2: From Browser Settings (Whitelist)

• 1.Open Settings:

• Chrome: Go to chrome://settings/content/javascript in your address bar.
• Edge: Go to edge://settings/content/javascript.

• 1.Scroll to the Allowed to use JavaScript section.
• 2.Click Add and enter the website URL (e.g., `example.com` or `[*.]example.com` to include all subdomains).

Apple Safari (macOS)

• 1.Open Safari and open the website you want to allow.
• 2.In the top menu bar, click Safari > Settings (or Preferences).
• 3.Click the Websites tab at the top.
• 4.In the left sidebar, click JavaScript.
• 5.On the right, find the website under Currently Open Websites and change the toggle/dropdown next to it to Allow (or On).

Brave Browser

If you use Brave and have scripts blocked via Brave Shields:

• 1.Go to the website.
• 2.Click the Brave Lion icon in the address bar to open Shields.
• 3.Click Advanced Controls (if collapsed).
• 4.Turn off Block Scripts (or toggle Shields down for that specific site).

Mozilla Firefox

Firefox does not include a built-in per-site whitelist setting for JavaScript in its standard preferences menu.

• If you blocked scripts globally via about:config:

You cannot whitelist single sites natively this way.

• The best approach for Firefox:

Use an extension such as uBlock Origin or NoScript:

• With uBlock Origin: Click the extension icon on the site, then click the </> (Disable JavaScript) button to toggle it back on for that domain.
• With NoScript: Click the NoScript icon and select Trust or Temp. TRUST for that domain.

Using an Extension (uBlock Origin, NoScript, etc.)?

If JavaScript was turned off by a content blocker or security extension rather than your browser settings:

• 1.Click the extension’s icon in your browser toolbar while on that website.
• 2.Click the button to allow scripts or add the domain to the extension's whitelist.
• 3.Refresh the page.

Here are the quickest ways to re-enable JavaScript, depending on where it was turned off.

First, verify it’s really blocked

• Try a known JS-heavy site (e.g., maps). If maps won’t load or you see “JavaScript required,” proceed below.
• Check for an icon in the address bar indicating blocked permissions or a shield from a content blocker.

Enable JavaScript in common browsers

• Google Chrome (Windows/macOS/Linux/Android)

• Go to: chrome://settings/content/javascript
• Turn “Allowed (recommended)” ON.
• Under “Customized behaviors,” remove the site from “Not allowed” if listed.

Android: Chrome > Menu (⋮) > Settings > Site settings > JavaScript > Allowed.

• Microsoft Edge (Chromium)

• edge://settings/content/javascript
• Set to “Allowed.” Remove any site from “Block.”

• Firefox (Windows/macOS/Linux)

• In the address bar, type about:config and press Enter.
• Search for javascript.enabled and set it to true.
• Also check per-site permissions: click the padlock in the address bar > Connection secure > More information > Permissions.

• Safari on macOS

• Safari > Settings (or Preferences) > Advanced.
• Ensure “Show features for web developers” is ON if needed, then go to the Websites tab > Left sidebar: “Content Blockers” and “Pop-up Windows” (JS itself is under Advanced in older versions).
• In recent macOS versions: Safari > Settings > Security > enable “Enable JavaScript.” If a specific site is affected, check Websites tab > JavaScript and set the site to Allow.

• Safari on iPhone/iPad (iOS/iPadOS)

Settings app > Safari > Advanced > JavaScript > ON.

• Brave

• brave://settings/content/javascript > Allow.
• For a single site: click the Brave lion icon in the address bar (“Shields”) and lower Shields for that site or allow scripts.

• Tor Browser/Privacy browsers

Security Level might be blocking JS. Click the shield/tor icon > Security Level > choose Standard to allow JS.

Check site-specific permissions

• Click the padlock or info icon in the address bar.
• Open Site settings and ensure JavaScript is set to Allow for that site.
• Clear any “Not allowed to use JavaScript” entries.

Disable extensions that block scripts

• Look for blockers like NoScript, uBlock Origin, Privacy Badger, Ghostery, DuckDuckGo, or security suites.
• Temporarily turn them off or add the site to the allowlist/whitelist.
• In Chrome/Edge/Brave: Menu > Extensions. In Firefox: Add-ons and themes.

If it’s managed or forced off

• Work/School devices may enforce policies. In Chrome/Edge, “Your browser is managed” often appears; contact IT.
• Parental controls, Screen Time, or security software can block scripts—check those settings.

Developer or site issues

• If you own the site and it still “blocks JS,” check:
• Content Security Policy (CSP) isn’t disallowing scripts.
• NoScript headers/meta aren’t present.
• Service workers or adblocker-induced errors aren’t stopping script execution. Use the browser console (F12) to view errors.

After enabling, test

• Refresh the page (Ctrl/Cmd+R) or do a hard reload (Ctrl/Cmd+Shift+R).
• Try this in the address bar: javascript:alert('JS is enabled') — note some browsers block javascript: URLs in the address bar; console test: open DevTools (F12) > Console > type 1+1 and press Enter (this won’t prove JS was disabled globally, but it confirms the console runs).

Safety note

• Only enable JS for sites you trust. If you had it off for security, prefer per-site Allow rather than enabling globally.

If you tell me your device and browser (e.g., “Windows 11 + Chrome” or “iPhone + Safari”), I’ll give exact, step-by-step instructions tailored to it.

To unblock JavaScript, open your browser’s settings and turn JavaScript back on, or allow it for the specific site that’s blocked.¹⁴

• Chrome: go to Settings → Privacy and security → Site settings → JavaScript, then choose Sites can use JavaScript.¹⁴
• Edge: go to Settings → Privacy, search, and services → Site permissions → JavaScript, then set it to Allowed (recommended).¹²
• Safari: open Safari Settings/Preferences → Security, then check Enable JavaScript.¹⁵
• Firefox: open about:config, search for javascript.enabled, and set it to true.⁵⁷

If it still does not work, check whether an extension, content blocker, or privacy setting is disabling scripts for that site, then reload the page after changing the setting.⁵⁷

Here's how to re-enable (unblock) JavaScript in the most common browsers:

Google Chrome

Click the three-dot menu at the top-right of Chrome, open Settings → Privacy and security → Site settings, scroll to Content and click JavaScript, then set Default behavior to "Sites can use JavaScript."

Shortcut: paste chrome://settings/content/javascript into the address bar and press Enter to jump straight to the toggle.

If you only want to allow it on one specific site instead of globally: click the tune icon (sliders) or lock icon on the left side of the address bar, click Site settings, find JavaScript in the permissions list and change it from Block to Allow, then reload the page.

Mozilla Firefox

Open Firefox, type about:config in the address bar, hit Enter, click "Accept the Risk and Continue," click the Show All button, find the javascript.enabled row, click the toggle to change it from "False" to "True," then close preferences and refresh your browser.

Safari

From the Safari menu, select Settings > Security tab, click the Enable JavaScript check box, then click Close and refresh the browser.

Internet Explorer (if still applicable)

Click "Tools" in the menu bar, choose "Internet Options," click the "Security Tab," tap "Custom Level," scroll down to the "Scripting" heading, select "Active Scripting" to turn on JavaScript, click "Ok," and refresh your browser.

Opera

Click the Opera button at the top left and highlight Settings, then highlight Quick Preferences and tick the Enable JavaScript option. Refresh your page and JavaScript will be activated.

Note: JavaScript is usually enabled by default; if one website still reports it disabled, check that site's permissions and any script-blocking extensions (like ad blockers, NoScript, or privacy extensions), since those can override browser-level settings for specific sites.

Unblocking JavaScript: A Browser-by-Browser Fix

The fix depends on where JavaScript got blocked — globally in the browser, per-site, by an extension, or by a network/device policy. Work through these in order; the first one often solves it.

1. Chrome / Edge — per-site permission (fastest fix)

If only one site is broken, don't change global settings. Open the failing site, click the lock icon (or the tune/sliders icon) in the address bar, choose Site settings, and set JavaScript to Allow. Reload the page. testyourbrowser.com enablejavascript.io

2. Chrome / Edge — re-enable globally

If JavaScript is off at the browser level, every site breaks.

• Chrome: go to chrome://settings/content/javascript → under Default behavior, select Sites can use JavaScript. Chrome saves instantly. enablejavascript.io
• Edge: go to edge://settings/content/javascript → set Allowed (recommended) to On. testyourbrowser.com

You can also navigate via Privacy and security → Site settings → Content → JavaScript. While you're there, check the Not allowed exceptions list — a site you need may be sitting in it. enablejavascript.io

3. Firefox — uses different mechanisms

Firefox has no normal per-site JavaScript toggle, so there are two routes:

• The real culprit is often an extension. NoScript blocks scripts unless you allowlist a site; Ghostery blocks third-party scripts. Disable them or add an allowlist rule. support.mozilla.org
• Advanced fix: type about:config in the address bar, accept the risk, search for javascript.enabled, and if it's false, click Toggle to set it back to true (it's true by default). support.mozilla.org

4. Safari

Safari handles this globally rather than per-site:

• Mac: Safari → Settings → Security → check Enable JavaScript. Then quit and reopen Safari — changes here sometimes need a restart. testyourbrowser.com
• iPhone/iPad: Settings app → Safari → Advanced → turn JavaScript On. testyourbrowser.com
• Also check Content Blockers via the aA menu in the address bar and turn them off for that site. testyourbrowser.com

5. Extensions and privacy modes

Script blockers can make a site look broken even when JavaScript is enabled. Test in Incognito/InPrivate (where extensions are off) — if the site works there, re-enable extensions one at a time to find the blocker. testyourbrowser.com

Also worth checking:

• Firefox: set Enhanced Tracking Protection to Standard as a test. testyourbrowser.com
• Brave: lower Shields for the site. testyourbrowser.com

For a bank or enterprise login, keep changes site-scoped rather than loosening global privacy settings. testyourbrowser.com

6. Network, DNS, or managed-device blocking

If none of the above applies, the scripts may never be reaching your browser:

• Try the site on a mobile hotspot. If it works there, your router, DNS filter, or office proxy is likely blocking a required CDN domain. testyourbrowser.com
• On a work/school device, open chrome://policy or edge://policy and look for policies mentioning JavaScript or content settings — only an administrator can change those. testyourbrowser.com

7. Verify

Reload the page and confirm it populates normally. In Chrome, reloading an interactive site like Gmail or YouTube is a good sanity check. enablejavascript.io If it still breaks in one browser only, test in a different browser profile to rule out a corrupted profile or extension set. testyourbrowser.com

Quick reference: Chrome and Edge support per-site JavaScript permissions, so you can scope changes narrowly. Safari and Firefox are more global in nature — for those, use content blockers or extension allowlists to limit your changes. testyourbrowser.com

To unblock (enable) JavaScript, follow the instructions for the web browser or device you are using:

Google Chrome

• Desktop (Windows / Mac):

• Click the three vertical dots in the top-right corner and select Settings.
• Click Privacy and security in the left menu.
• Select Site Settings.
• Scroll down to the Content section and click JavaScript.
• Select Sites can use JavaScript.
• (Optional) Check the Not allowed to use JavaScript section below it to ensure the specific website you want to visit isn't listed there.

• Android:

• Open Chrome and tap the three dots in the top-right corner.
• Tap Settings > Site settings.
• Tap JavaScript and toggle the switch On.

Apple Safari

• Mac:

• Open Safari, click Safari in the top menu bar, and choose Settings (or Preferences).
• Click the Security tab.
• Check the box next to Enable JavaScript.

• iPhone / iPad:

• Open your device's Settings app.
• Scroll down and tap Safari (or Apps > Safari on iOS 18+).
• Scroll to the very bottom and tap Advanced.
• Toggle the JavaScript switch to green (On).

Microsoft Edge

• 1.Click the three dots in the top-right corner and select Settings.
• 2.In the left sidebar, click Cookies and site permissions.
• 3.Under All permissions, click JavaScript.
• 4.Turn on the switch next to Allowed (recommended).
• 5.Make sure the site isn't listed under the Block list.

Mozilla Firefox

In Firefox, JavaScript is enabled by default and the setting is hidden from standard menus.

• 1.In the address bar, type about:config and press Enter.
• 2.Click Accept the Risk and Continue.
• 3.In the search box at the top, type javascript.enabled.
• 4.If the value is set to false, click the Toggle button (or double-click the row) so it changes to true.

Still Blocked? Check Extensions and Shields

If JavaScript is enabled in your browser settings but a webpage still says it is disabled, an extension or security tool is likely blocking it:

• Ad-blockers or Privacy Extensions: Tools like uBlock Origin, NoScript, or Privacy Badger can block scripts. Click the extension icon in your toolbar to allow JavaScript for that specific site.
• Brave Browser: If you use Brave, click the Brave Shield icon (lion logo) in the address bar and ensure Block Scripts is toggled off.

JavaScript is usually enabled by default. If a site says it’s blocked or disabled, check the browser setting, any per-site block, and extensions.

Google Chrome (desktop)

• 1.Open Settings → Privacy and security → Site settings → JavaScript.
• 2.Select Sites can use JavaScript.
• 3.Check the Not allowed list and remove any site you want to unblock.
• 4.Reload the page.

Shortcut: paste chrome://settings/content/javascript into the address bar.

Android: Menu → Settings → Site settings → JavaScript → turn it on. Per site: click the lock or tune icon in the address bar → Site settings → set JavaScript to Allow.

Microsoft Edge

• 1.Open Settings → Cookies and site permissions → JavaScript.
• 2.Turn on Allowed (recommended).
• 3.Remove the site from any block list if it’s listed there.
• 4.Reload the page.

Shortcut: edge://settings/content/javascript.

Safari

Mac: Safari menu → Settings → Security → check Enable JavaScript. iPhone/iPad: Settings → Apps → Safari → Advanced → turn JavaScript on.

Firefox

Firefox doesn’t have a normal settings toggle for this.

• 1.Type about:config in the address bar and accept the warning.
• 2.Search for javascript.enabled.
• 3.Set it to true (toggle or reset).
• 4.Reload the page.

If the setting is already on

• Extensions: script blockers and privacy tools (NoScript, uBlock Origin, Privacy Badger, and similar) often block JavaScript. Disable them temporarily or allow the site in the extension.
• One site only: use the lock/site-info icon in the address bar and allow JavaScript for that site.
• Managed device: a work or school policy can lock the setting. You may not be able to change it without an admin.

After changing the setting, fully reload the page (or close and reopen the tab).