Reset my firefox and lost all my addons.

all the addons have gone missing or not installed. I don't remember all of the addons that have been installed.
Is there a backup file on my pc?

Look on your desk a file; Old Firefox.

https://support.Mozilla.org/en-us/KB/recovering%20important%20data%20from%20an%20old%20Profile

Recovering important data over an old profile
If you had to create a new Firefox profile, this article explains how to retrieve information such as bookmarks, history and an old passwords.

Tags: Firefox

Similar Questions

Maybe you are looking for