I-Firefox Community Forum

The past few months, I get a periodic issue with Firefox. I've done some searches and looked, but nothing anyone has suggested seems to work. I also run the Chrome browser on this same computer (I have 2 Etsy shops and prefer to stay logged in to both of them, so 2 browsers are a must). NOTE: I've been doing it 'this way' since the early 2010.

This is a new Dell Windows 11 desktop. No issues with the computer. The browser is up to date.

I keep from 3-8 tabs open at a time. My Etsy shop. My email. My shipping supplier. Etc. None of these run a lot of hot graphics or anything. Suddenly, I see 'sparkles (the only way I know to describe it) on some text boxes/etc) then...the address bar starts with the flashing pink/magenta.

Appreciate some help in getting this to stop. Again, doesn't happen on the Chrome browser. Only Firefox. I've used Firefox for a very long time and appreciate it. So I hope that I don't have to go to a different browser.

Thanks in advance. I've attached a photo of what I'm seeing. Note that this vibrates...not static.

I am running 150.0.1 on Debian with Cinnamon. I set the fonts to use for Chinese to a custom fonts, where I left Latin fonts to use untouched, I found I must set Latin to use my custom Chinese fonts in order to display Chinese webpage properly, where the English fonts will get out of place, extra spacing in Apostrophe for example, "It's" will become "It 's", this is particular trouble when viewing on Youtube. But I set to use the same custom fonts on Chrome both English and Chinese displayed perfectly.

It's very tricky the clone a FF profile, so I want to avoid that. (If there is a SIMPLE way to clone a FF profile, that would suffice. I have found no such animal.)

I would like to start Firefox by invoking different UserChrome.CSS files.

Is that possible?

I am not intereted in RUNNING both these simultaneously.

yes, I realize I could go through renaming and unrenaming files before starting FF to achieve this. But, I am I'm looking for a method using native FF resources.