Firefox..... the ultimate in crap software.

[PISSED-OFF]

Firefox has become nothing but crap software. 
Starting at least a decade ago.
I am done with their abject stupidity and ineptness.

[dftf]

@PISSED-OFF : if you want a Firefox that changes less-often, switch to the business 'ESR' version:
https://www.firefox.com/download/all/desktop-esr/

Or Brave, Google Chrome, Microsoft Edge, Opera, Safari (if you're on a Mac) and Vivaldi all exist.
They'll usually ask if you want to import your data the first time you open them, so switching is easy.