I meant 89.01. Not sure how to edit. Sorry.

Step 1: Go to new tab, type 'about:config' Step 2: Search in the preference name 'xpinstall.signatures.required' Step 3: Change the status from true to false Step 4: Go to new tab, type 'about:preferences' and then go to privacy & security Step 5: Scroll down and find 'Firefox Data Collection and Use' Step 6: Tick this three checkbox - Allow Firefox to send technical and interaction data to Mozilla - Allow Firefox to make personalized extension recommendations - Allow Firefox to install and run studies

Step 7: Click on 'View Firefox studies' in the 'Allow Firefox to install and run studies' selection Step 8: Click on 'Update Options'. After that, it will redirect you to the 'Firefox Data Collection and Use' again Final Step: Click on 'Update Options' and check your add-ons. It will fix it.

I hope the step that I provide will help you.

If the above does not help, It’s possible that there is a problem with the file(s) that store the extensions registry.

Type about:support in the address bar and press enter.

Under the page logo on the left side, you will see Application Basics. Under this find Profile Folder. To its right press the button Show Folder. This will open your file browser to the current Firefox profile. Now Close Firefox.

Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder

Linux: Under the page logo on the left side, you will see Application Basics. Under this find Profile Directory. To its right press the button Open Directory.

Delete all extensions* files and compatibility.ini in the Firefox profile folder to reset the extensions registry.

• https://support.mozilla.org/kb/Profiles

New files will be created when required.

After, restart Firefox.

See "Corrupt extension files"

• http://kb.mozillazine.org/Unable_to_install_themes_or_extensions

• https://support.mozilla.org/kb/Unable+to+install+add-ons

+++++++++++++++++++++++++++ You will have to approve the updating one last time.