I-Firefox Isithangami Sokwesekwa

I have two FF profiles. When I open a private window in each profile and go to YouTube, one displays YT in light mode, while the other displays it in dark mode. In both windows, YT is set to ‘Appearance: Device theme’. Both profiles use FF’s ‘Dark’ theme. The same happens when I go to other websites that utilise ’ prefers-color-scheme’ (e.g. https://dashboard.tugboat.qa).

Since these two profiles display websites in different colour schemes on the same computer, it’s clearly not an OS setting. It therefore must be a setting in FF - one that’s enabled in one profile but disabled in the other. I’d like to know what it is.

I’ve tried comparing about:config in both profiles, searching for things like ‘dark’, ‘theme’, ‘color’, etc. But I can find no differences. Can anyone shed some light (pun intended) on this for me?

I have Firefox on an old MacBook which hasn't had its macOS updated for a couple of years, and a new Mac running up-to-date Monterey. In both, Firefox has just developed the same problems at the same time: pages won't load, and the program won't shut down normally -- I have to use force quit. Safari works fine and I've tried all the usual solutions, bar deleting and reloading the app. I don't want to do that yet since the problem is the same on two different computers and an old and a new macOS. Since Firefox has recently updated, has that caused the problem?

edited iOS to macOS as iOS is a mobile OS for iPhones and moved thread to (desktop) Firefox section.

Hi.

I need to print out my saved passwords. I have no cellphone to access, just my laptop and printer. I only use Firefox and no other browser. If my laptop gets hacked or breaks down, then I need to use someone else's computer to access my passwords in an emergency, and can't access my passwords to do so...so printing them out periodically is the smartest thing I can think of.

Help, anyone? This is pretty important to me. Thank you!