Extension issues and more
I am using the latest version of Firefox on Linux Mint. I've had some flash on opening issues that I've been unable to permanently prevent. Suddenly my adblock software is not working. I tried uninstalling, reinstalling, different adblocks-no improvement. No extension software is showing on my toolbar and selecting the extensions software just brings up a suggested extensions.
Wšykne wótegrona (3)
Did a browser refresh that solved most of the problems. Still have the flash on opening but I can live with that and play with solutions as time allows.
You should provide a video or screenshot(s) of the issue. Try downloading Firefox from Mozilla. Download, unzip, and run firefox-bin from the folder and see if you have the same issue. https://www.mozilla.org/en-US/firefox/all/#product-desktop-release
If cool with the flash, mark this issue as resolved. We'll leave the light on for ya. ;-))
Try running in native Wayland by setting the environment variable MOZ_ENABLE_WAYLAND=1.