Diễn đàn hỗ trợ Firefox

Hi Win10 PC fully up to date. Changed my printer from a Xerox to an HP laser. In the control panel, set the HP as the default printer. MS Office prints on the HP without prompting. Firefox (134.0.2) always defaults to the Xerox. The HP is available in the drop down box. Restarting the PC or reloading Firefox makes no difference, Firefox always defaults to the (non existent) Xerox. MS Edge defaults to the HP. Any ideas? Regards - Andrew

I used to have an occasional sound problem with FF, usually felt when YT clips could not be heard any more. I mean to remember that it could be fixed (until next time) by restarting the file explorer somewhere in Task Manager - not a convincing solution but one I could live with.

Today, there's a new situation. Again, trigger was the missing YT sound in FF - not in fx Edge, and that the Task Manager trick didn't work (or maybe I restarted the file manager in the wrong tab?). Looking for a solution, I happened to see that the YT mute function in the FF tabs seems to be gone. However, other sounds are affected likewise. Also, I can't see them in Edge either. After various restarts (or maybe something else I did, instigated by the various instructions I found?), the sound is back.

However, while continuing to pursue possible solutions, I also happened to find that my browser is being 'administered by my organisation' - what ever that means (see two annexes). Who did that? I would say, this is not something I did, I would prefer to see it gone. But how? Will the other browsers (which I keep as a spare, and that I'm hardly familiar with) be likewise affected?

This is an equation with too many unknowns for my limited knowledge, are such effects known? Would there be an approved way-out for it?

PS I have checked https://support.mozilla.org/bm/questions/1412934 especially the message posted by lazizakhmedov1014, and do not see this to apply to me - short of a reinstall - FYI

Since the last major update, the title bar is blank. Not missing, blank white. If I use the task bar to shrink and restore it, it appears normally. Sometime in normal use it suddenly appears. A search didn't find anything for me. Any ideas?

I've recently sync'd my PC bookmarks etc to my android tablet and since then web sites that previously remembered me now keeping asking me to log in. BBC news, FaceBook are examples.

I really need help with a border around my Firefox on windows 10. I've tried every UserChrome workaround that I can find and it may be an issue at the system level. But I've never had this issue on any program.

The border: https://imgur.com/a/S1EL5Oa

-This issue is only present on my win10 desktop and not my win11 laptop. -F11 fullscreen DOES fix the issue but I don't really want it in fullscreen. -Displaying the titlebar also DOES fix the issue but I'd like it hidden. -I do have a second monitor, but I unplugged it and restarted FF. It's the same resolution. -It's not a profile or theme problem. It persists on new profiles and reinstallation.