If you want to kill the fruit flies quickly try to put out a bowl of vinegar, some sugar and a little bit of dish soap. I found this to be super effective.
The sugar and vinegar kinda mimics the scent of rotten fruit which they are drawn too and the dish soap will destroy the surface tension, so that they just drown.
I haven't really had any problems with any sites yet. Except for Google Meet. For some reason it's totally laggy and sluggish on Firefox but works perfectly on Chrome.
Currently using Firefox since half a year for everyday stuff and work.
Is this what heaven looks like?