Firefox Add-Ons Not Working: 10 Ways to Fix it

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If your Firefox Add-Ons Not Working. The problem could also be caused by wrong date/time settings on your system or a corrupt Firefox user profile (or any of its settings or files). The user runs into the problem when he opens Firefox. The web browser opens, but either it doesn’t show any add-on icons or the add-ons don’t work at all (for some of the users, the issue was limited to some addons).

Almost all of the major operating systems have had problems with this, usually after a Firefox update. Before moving on to other ways to fix the Firefox add-ons, you should restart your system to make sure the problem isn’t just a temporary one. Also, make sure the addons are turned on in the Firefox browser’s addons menu. Last but not least, make sure you have the latest version of Firefox.

Fix: Firefox Add-Ons Not Working

Close and Re-launch Firefox

1. Press Ctrl + Alt + Delete keys to summon the Task Manager.
2. Navigate to Processes and highlight it to check the active processes running on your computer.
3. Scroll to Firefox and right-click on it, and select End Task.
4. After a few seconds, open Firefox.
5. Try to use the installed add-ons and see if they can now perform their respective tasks or not. If they are not working, then try these other troubleshooting methods mentioned here.

Modify Your System Date and Time Settings

1. Press Windows + I to open Settings.
2. Navigate to Time & Language > Data & time.
3. Disable Set time automatically and Set time zone automatically options. Then, click the Change button.
4. In the pop-up window, adjust the date and time to correct them. Click the Change button.

Edit the Extensions.json File

1. Open Firefox, input about:support in the address bar, and press Enter.
2. Locate the Profile Folder item and click the Open Folder button next to it.
3. Now, exit Firefox and close all the related processes. In the pop-up File Explorer window, locate the extensions.json file and open it with Notepad.
4. Press Ctrl + F, input appDisabled, and click Find Next to locate the item quickly. Then, change its value to false. Next, search for signedState in the same way and change its value to 2.
5. Save the file and close it.

Remove the Toolbars and Buttons Customization

1. Launch Firefox and open the Menu.
2. Choose Customize from the drop-down Firefox menu.
3. When you get to the following page, click the Restore Defaults button at the bottom right corner of the window.

Reset Mozilla Firefox

1. Launch Mozilla Firefox.
2. Lik the 3-horizontal bar button at the upper right corner.
3. From the menu, select Help.
4. Under that, a new sub-menu will open from which you have to select the option More troubleshooting information.
5. A new window will open. You will see an option Refresh Firefox. Click on it.
6. To confirm the action, click again on Refresh Firefox when a pop-up dialog box appears.

Restart the Computer

we have also had problems with Firefox add-ons freezing or crashing while I was using it. Sometimes, it’s just the add-on that won’t work. I’ve seen that turning the computer off and on again fixes the problem. You should also give it a try.

• Click the Windows key on the taskbar of windows.
• Click on the Power icon at the bottom right corner from the console that shows up.
• From the menu, select Restart
• After the computer restarts, launch Mozilla Firefox and check if the add-ons are working or not.

Disable DOM Storage on Firefox

1. Open Firefox browser.
2. In the address bar, type about:config and press enter.
3. When prompted with a warning message, proceed by clicking on Accept the Risk and Continue.
4. In the search bar that shows up on the next page, enter the following code.dom.quotaManager.useDOSDevicePathSyntax
5. As the above term shows up, you will see its value is set to True.
6. Disable the component temporarily by clicking on the toggle and setting it to False.
7. Relaunch the browser to execute the settings change you just did.

Try to Disable Extension Preference on Firefox

1. Open Mozilla Firefox.
2. In the URL bar, type about:config and press enter.
3. You will see a warning message, and you have to click on Accept the Risk and Continue.
4. On the next page, you will see a search box.
5. In that search box, type extensions.webextensions.remote
6. The above term will show up with its value set as True.
7. Click on the toggle button to change the value of the option to False
8. Make sure to relaunch Mozilla Firefox.

Check out the Firefox blog

As we’ve seen before, it’s possible that the reason why Firefox add-ons not working had nothing to do with the user. On the Firefox Add-ons Blog, it’s easy to check if that’s true, and you can also see how to fix most of the bugs and problems that are already there.

Create a New User Profile

1. Press Windows + R to open the Run box.
2. Type firefox.exe -p and hit Enter to open the Firefox Profile Manager.
3. In the Profile Manager window, click on Create Profile…
4. Click on Next in the Create Profile Wizard that opens.
5. Give a name for the new user profile in the text box below Enter the new profile name.
6. Back in Choose User Profile, select the new profile name, and click on Start Firefox.

If you can download Firefox, than you can check on official website

FAQ

Why are my Firefox addons not working

If your Firefox browser is not up to date, the add-ons might not work. The problem could also be caused by wrong date/time settings on your system or a corrupt Firefox user profile (or any of its settings or files)

How do I stop Firefox from disabling add-ons

• In the upper right corner of the browser’s toolbar, click the Firefox menu icon.
• Pick Add-ons.
• Choose Extensions from the menu on the left.
• Select “Enable” next to each extension you want to use.

How do I refresh my Firefox extensions

• Click the button that says “Menu.”
• Click “Reload Firefox”… then click Refresh Firefox in the window that pops up to confirm.
• When you’re done, your imported information will be shown in a window.
• Choose if you want Firefox to restore all windows and tabs or just some of them, and then click the Let’s go!