Fix uBlock Origin When it is Not Working on Firefox?

A lot of Firefox users experience the problem where the uBlock extension fails to work and is not blocking the ads anymore. This means it won't block the pop-ups on the website anymore, which will defeat the whole purpose of having an ad-blocker.

If you wish to know how to fix uBlock origin not working problem, then read out the different solutions mentioned below. Before we dig into the solutions, let's first get to know why the uBlock origin is not working.

Why is uBlock Origin not Working?

Below we have mentioned some of the reasons why your uBlock origin extension is not working. These include:

Interference by another extension.
Connection problems by IPV6
Outdated browser
Accumulated browser cache
Change in the configuration of your browser.

How to Fix uBlock Origin not Working on Firefox?

Below are the steps that you need to follow in order to fix uBlock origin not working on Firefox problem.

1) Turn Off IPV6 in Firefox

Step 1: Launch Firefox and go to the address mentioned below.

about: config

Step 2: You are going to see a warning page. Now, you need to select the option of "Accept the risk and continue".

Step 3: Go to the search area and then type network.dns.disableIPv6.

Step 4: After that, go to the result and then select the option of Toggle Button to network.dns.disableIPv6 for changing the value to True.

As Firefox automatically supports IPv6, it can lead to network problems. If you disable it, then it will help you resolve the uBlock origin not working issue. After that, restart Firefox and check whether the uBlock Origin extension is working properly or not.

2) Clear the Browser Cache and Cookies

Below are the easy steps that you need to follow to clear your browser cookies and cache.

Step 1: Open your Firefox browser and then select the three lines given at the top-right corner and then select Settings.

Step 2: Go to the Settings page and then select the Privacy and Security option given at the left.

Step 3: After that, go to the right side and then scroll down to cookies and site data. Then, go to Cached Web Content and then select Clear.

Step 4: Select the option of Clear Now to confirm.

After that, restart your browser and then the uBlock extension will start working properly.

3) Reset uBlock Origin

Step 1: Launch your web browser and then go to the 3 gear icon from the menu to launch the dashboard.

Step 2: Select the Settings to tab from the dashboard and then go to the bottom.

Step 3: Choose the option of back up to file and then select Restore default settings.

This will reset your extension and create a backup for your saved settings.

4) Try Using Another Browser

If you are experiencing problems with your uBlock Origin or your Chrome or Firefox browser. The best alternative of Firefox is the Opera browser. This browser has its own ad-blocker and it works amazingly with other browsers.

It can create and read filters from the host files. This extension blocks all the irritating ads and you don't get interrupted while using the internet.