Mozilla removes all Avast Firefox extensions


Level 26
Content Creator
Oct 23, 2014
Just in case you are curious: It's quite easy to figure out whether or not an extension is spying on you. In Firefox just go to this URL: about:debugging#/runtime/this-firefox

Then click "Inspect" next to the plugin:

View attachment 230540

This will open the usual web developer tools that you can also open with F12, but for the addon specifically. You can then pretty much just switch to the network tab and start browsing to sites. Any requests performed by the extension you are inspecting will show up in the network log and you can see exactly what kind of data is being transferred.

For TrafficLight for example, the extension will send every single URL you visit to Bitdefender:

View attachment 230541

Works for all extensions really and you don't have to blindly trust what the extension creator claims they send. Chrome has a similar tool IMHO, but I switched away from Chrome some time ago once they announced their breaking changes to ad blockers. Never looked back.
I want to say I'm grateful you are taking time to explain this to us. Thank you.


Level 8
May 17, 2015
Don't know how to get to Request Body view.

I can get to Params view

Last edited:

Caps Lock

New Member
Jan 3, 2020
As I know, Firefox extensions are not included in the Mozilla blacklist. Does this mean that Avast and AVG extensions were removed from the store but were not blocked? Will previously installed extensions continue to work in Firefox browsers?