Firefox keeps automatically resetting self

Yes. Update to the latest version. If it does not help, wait when Mozilla fix it. Or setup previous version. In the last version (or versions) Firefox sometimes reset settings for itself and for addons when you abnormal close the browser (killing process, pressing reset button, power off, BSOD etc). I think that its a bug

Do you have a Firefox account? if not, maybe try to use that? An account saves stuff for you like logins, add-ons, options, etc.

I used to regularly have a similar issue though it hasn't happened in quite a while. I just started including %APPDATA%\Mozilla\Firefox\Profiles in my nightly backup so that I could restore to the previous day if Firefox (or one of the add-ons) reset.

broken mozilla update. third time this happens (that I know so far).
try the esr version (supports some things that newest versions don't).
my solution: abandoned mozilla and went back to chrome.

It's burning up. Dying a quick death.

i honestly wouldnt use firefox anymore. it used to be a great browser, but mozilla's been steadily destroying it. when they FORCED that update that deactivated almost ALL of my useful addons, that was kinda the last straw. even when they sorta-reversed the update, they didnt all work any more. they had something great.. they destroyed it.. at this point, id honestly rather use internet explorer, thats how bad i think firefox has become.

sorry that doesnt really answer your question - if you like it, by all means stick with it, but i honestly think you should consider looking for an alternative - for firefox, its all downhill and getting worse from here on.

I like how the only alternative mentioned in this thread is Google Chrome, despite it being a RAM-guzzling mess to this day and all other Chromium-based browsers surpassing it vastly.

I thought it was something from my PC, glad I'm not the only one, so it's firefox's fault

I've been a Firefox user since 1.x and up to 3.6.x, switched away during the 4.0 debacle.

Tried Firefox for a month or so, recently, then the extension trainwreck happened.

I was not satisfied with Firefox, so now I'm back to Chrome, although not happy about it. (Yes, I have tried the other popular Chromium-based browsers)

I stoped on FF 56.0.2 but later changed to Waterfox (just copied profile from Waterfox 56.0.2 to Waterfox and everything working great). From that time i use Waterfox which based on FF 56.0.2 (with old extensions) + later security updates etc.

I agree that FF changed in bad way (at last for me). Still prefer it over chrome, but prefer old FF/Waterfox even more:).

Use this: Mozilla Developer Edition