You can get Adblock here:

• https://addons.mozilla.org/pt-br/firefox/addon/adblock-plus/

And magnifier here:

• https://addons.mozilla.org/en-us/firefox/addon/magnifier

Thank you, Diego. I ended up reinstalling all the add ons I lost, and that fixed my issue. Your links were so helpful.

When you reset Firefox then a new profile is created and some personal data (bookmarks, history, cookies, passwords, form data) is automatically imported and the current profile folder will be moved to the desktop to an "Old Firefox Data" folder.
Installed extensions and other customizations (toolbars, prefs) that you have made are lost and need to be redone.

It is possible to recover more data from the old profile, but be cautious not to copy corrupted files to avoid carrying over the problem.

• http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox