Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Adds are instaled and later its gone

  • 3 replies
  • 2 have this problem
  • 38 views
  • Last reply by leiaj64

more options

Hello Firefox support. I don't want to take lots of your time but i have a kinda problem... Idk how it works but fore example I install the Add block once and after I shut down the Web browser and run it like 10min after that add-on is gone. i did try it with other versions of Add block and its the same... Install -> shut down the Firefox -> open again and its gone. I did try to look in an internet a bit but didn't find anything interesting.. its like i didn't install it at all o.O i did try that again and again many times. I hope you could help me with that.

TYVM fore your time and have a nice day

Hello Firefox support. I don't want to take lots of your time but i have a kinda problem... Idk how it works but fore example I install the Add block once and after I shut down the Web browser and run it like 10min after that add-on is gone. i did try it with other versions of Add block and its the same... Install -> shut down the Firefox -> open again and its gone. I did try to look in an internet a bit but didn't find anything interesting.. its like i didn't install it at all o.O i did try that again and again many times. I hope you could help me with that. TYVM fore your time and have a nice day

Chosen solution

It is possible that there is a problem with files in the profile folder that store the extensions registry.

Delete the extensions.* files (e.g. extensions.json, extensions.ini, extensions.sqlite) and compatibility.ini in the Firefox profile folder to reset the extensions registry.

New files will be created when required.

See "Corrupt extension files":

If you see disabled or not compatible extensions in ""3-bar" menu button/Tools > Add-ons > Extensions" then click the cogwheel button (left of Search bar) to check if there is a compatibility update available.

If this didn't help then delete add-ons.json and possibly prefs.js in case there is a problem with preferences.

You can use this button to go to the current Firefox profile folder:

Read this answer in context 👍 1

All Replies (3)

more options

Chosen Solution

It is possible that there is a problem with files in the profile folder that store the extensions registry.

Delete the extensions.* files (e.g. extensions.json, extensions.ini, extensions.sqlite) and compatibility.ini in the Firefox profile folder to reset the extensions registry.

New files will be created when required.

See "Corrupt extension files":

If you see disabled or not compatible extensions in ""3-bar" menu button/Tools > Add-ons > Extensions" then click the cogwheel button (left of Search bar) to check if there is a compatibility update available.

If this didn't help then delete add-ons.json and possibly prefs.js in case there is a problem with preferences.

You can use this button to go to the current Firefox profile folder:

more options

Hello It seems it works

Ty fore your help

more options

My ability to see the add-ons install on Firefox is gone. The page will not display. I can't get potential add-ons to display. I am not sure if it is related on not but I looked at Personas Rotator add-on but didn't install it. Now it appears every time I start Firefox on the tab after my home page. Thanks. I am not tech savvy so please help me with step by step. Old woman can learn new things! You help is truly appreciated. Leiaj