Fix Google Search JavaScript Error in Firefox

You type a search, press Enter, and Google returns a blank page, a half-loaded list, or an error instead of results. Other browsers work fine on the same connection, so the fault sits inside Firefox.

Start with Troubleshoot Mode, then check the JavaScript preference, extensions, Google's site data, permissions, and graphics acceleration. Reset Firefox only when those fail.

In this guide, I have covered:

Why Google Search shows a JavaScript error in Firefox

You type a search, press Enter, and Google hands back a blank page, a half-loaded result list, or an error message. Chrome and Edge work fine on the same connection. That gap is what a JavaScript error looks like from the outside.

Something on the results page is not running its scripts. The cause is usually one of five things: Firefox’s JavaScript preference, an extension that rewrites pages, damaged cookies or site data for Google, a site permission you set once and forgot, or a graphics problem. Enhanced Tracking Protection can interfere with individual search features too.

Work through the checks in order, starting with the ones you can undo in seconds. Mozilla’s guide to JavaScript settings and preferences is worth a look if you want to verify the preference itself.

Test the search in Firefox Troubleshoot Mode

Before you change anything, run the search once in Troubleshoot Mode. It starts Firefox with most extensions and custom settings disabled, which makes it the fastest way to tell whether your own setup is causing the error.

1. Click the hamburger menu at the top right of Firefox.
2. Click Help.
3. Select Troubleshoot Mode….
4. Click Restart in the confirmation dialog.

Search for the same term in Google. If the results load here but fail in your normal window, an extension or a custom setting is behind it. Reopen Firefox normally and continue with the checks below.

You’ll know it worked when the query that failed a minute ago returns results inside the Troubleshoot Mode window.

Troubleshoot Mode runs as its own temporary session. Your normal tabs and browsing data stay untouched, so you can compare the two without committing to any change.

Confirm that JavaScript is enabled

Firefox ships with JavaScript switched on, so this check matters most when the preference was changed earlier, by you or by an old troubleshooting session. Verify the browser-wide setting before you touch anything else.

1. Type about:config in the Firefox address bar and press Enter.
2. Select Accept the Risk and Continue if Firefox shows its warning page.
3. Type javascript.enabled in the Search preference name box.
4. Check the value shown beside javascript.enabled.
5. If it reads false, select it and choose Toggle so it reads true.

Close the about:config tab, reload Google Search, and run another search. You’ll know it worked when the results render instead of stalling. If they still fail, leave the value at true and move to the next check.

Disable extensions that modify searches or web pages

Privacy add-ons, ad blockers, anti-tracking tools, script blockers, and anything that changes how search results look are all worth suspecting. Troubleshoot Mode already told you whether an extension is involved. Inspecting the list directly tells you which one.

1. Click the hamburger menu and select Add-ons and themes.
2. In the left sidebar, click Extensions.
3. Use the blue toggle next to each extension to disable it. Start with ad blockers, tab managers, and any extension you installed in the past few weeks.
4. Restart Firefox from the hamburger menu .
5. Use Firefox normally for a few minutes, then check about:performance. If usage dropped sharply, re-enable extensions one by one to find the offender.

Reload Google Search and search again. If the error disappears, turn extensions back on one at a time until it returns. The one you just enabled is your culprit, so leave it off or update it.

You’ll know it worked when results load with every other extension still running.

Clear Google site data

Cookies and cached files belonging to Google can go bad, and one damaged cookie is enough to stop the search page from finishing its setup. Clearing data for the Google domain resets that local state and leaves your other sites alone.

1. Open the menu at the top right of Firefox and click Settings.
2. Select Privacy & Security from the left sidebar.
3. Scroll to the Cookies and Site Data section and click Manage Data….
4. Type the site's name into the Search websites field to find it faster.
5. Select the site, then click Remove Selected.
6. Click Save Changes and confirm the prompt.
7. Reopen the site in a new tab and pin it again.

Return to Google and submit a search. You’ll know it worked when the search box responds and results appear without the error. If the page still fails, close the tab, open a new one, and try again before changing more settings.

For a wider cleanup, clear cookies and cache for all sites in Firefox. Do the site-specific reset first when Google is the only thing breaking.

Check Firefox’s permissions for the site

A permission you blocked months ago can stop parts of a page from loading, and it is the kind of setting nobody remembers changing. Check what Firefox is holding against Google.

1. Open Settings from the Firefox application menu.
2. Select Privacy & Security.
3. Scroll to Permissions.
4. Select Settings… beside Site Permissions.
5. Locate Google in the list of sites with changed permissions.
6. Remove the Google entry so Firefox returns it to the default permissions.

Reload Google Search and check the results. Removing the entry only affects Google, so this one is safe to try early. You’ll know it worked when interactive parts of the page respond again.

Turn Enhanced Tracking Protection off for Google

Enhanced Tracking Protection blocks trackers by default, and on rare occasions it also blocks a request the search page needs. Test it if the error started right after a Firefox update or a protection change.

1. Open the padlock in the address bar while viewing Google Search.
2. Select Connection secure to open the site information panel.
3. Select Enhanced Tracking Protection.
4. Choose Off for this site, or use the temporary option if one is shown.
5. Reload the page and run the search again.

If searching works with protection off, the setting is involved. Turn protection back on and decide whether a permanent exception for Google is worth the privacy trade-off. You’ll know the test was conclusive when the error returns the moment protection is re-enabled.

ALERT: Turning off Enhanced Tracking Protection for a site drops a privacy guard for that site. Switch it back on if the test changes nothing.

Test hardware acceleration

If Google Search breaks while other script-heavy sites work, the problem may be how Firefox draws the page rather than the page itself. Toggling hardware acceleration tells you whether the current graphics setting is responsible.

1. Click the hamburger menu and choose Settings, then select General from the left sidebar.
2. Scroll to the Performance section.
3. If "Use recommended performance settings" is checked, uncheck it to expose the manual options.
4. Uncheck "Use hardware acceleration when available".
5. Restart Firefox from the hamburger menu so the change takes effect.

Restart Firefox and try Google Search again. You’ll know it worked when the results load with the new setting in place. If nothing changes, restore your previous setting and move on.

Reset Firefox settings only as a final step

You have checked JavaScript, extensions, permissions, site data, tracking protection, and graphics. If the error is still there, resetting Firefox’s main settings to their defaults is the next lever. It can repair a corrupted search or security configuration, but it also wipes preferences you changed on purpose.

Settings like your default search engine, homepage, and language may go back to default, so note anything you want to recreate. The full walkthrough lives in how to reset Mozilla Firefox browser settings.

TIP: A refresh keeps your bookmarks, history, passwords, and open tabs. Extensions and custom preferences are removed, so reinstall only what you still use.

1. Open Settings from the Firefox application menu.
2. Select General.
3. Scroll to the bottom of the page.
4. Select Refresh Firefox… in the Firefox Settings area.
5. Choose Refresh Firefox to confirm.
6. Sign in to Firefox Sync again if you use it and want synchronized settings restored.

Test Google Search after the reset. If the error survives, run the same search in another browser and on another network. That tells you whether Firefox is the problem at all.

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