Extensions?

[tomturbomatic]

Suddenly a message popped up at the bottom of the screen:

Something went wrong with your extensions, so we had to reinstall them. You'll need to turn them on again.

I don't have hair extensions. What do I need to reinstall and how do I do it, please?

 

[DADoES]

 
One assumes you're referring to a web browser screen.  ;-)

Extensions are little add-on programs that give browsers more functionality and features such as ad blocking, more control over tabs, and downloading videos from YouTube.  Some antivirus/malware software includes an extension to tie directly into the browser.

Are you aware of having previously installed any extensions?  Which browser are you using?  Is anything now not working properly?