Diễn đàn hỗ trợ Firefox

I made the mistake to following Mozilla's advice on why my tabs stopped coming back after I closed out, despite the fact that I had that selected in my settings. Now I'm stuck with an "Old Firefox Data" folder on my desktop and I can't remove it because I need administrator privileges -- but it's my personal PC. WTF

Hello,

I would like to clear all of my sync data from my firefox account. This includes browsing history, passwords, payment methods, extensions, bookmarks, favourites, themes.

Thank you for your time.

Hi,

Firefox version: 139.0.4 (64-bit) OS: Windows 11

I have been having issues where Firefox tab will just crash out for no reason it appears and it happens at random times and once the tab start to crash, and I restore it, it will crash again and again. The only way tog et out of the loop is to restart Firefox.

I have tried: Refreshing/Reset, Clearing Cache and History removing all themes, disabling extensions, disabling my anti virus. Turning off hardware acceleration didn't make any different.

I currently have 2 extensions enabled: uBlock Origin 1.64.0 and Bitwarden Password Manager 2025.5.0

In the about:Crashes I have reported them all and they seem to have the same type of reasons in the Raw data/Minidump which are: EXCEPTION_ACCESS_VIOLATION_WRITE EXCEPTION_ACCESS_VIOLATION_READ

Any help as to what to try next?

Gaz

Firefox has just introduced wallpapers for browser home page. I cannot get it to work. It's either cropped too small or pixilated, is there a setting I need to adjust, or a particular image format? So that it looks ok.

i try access some web video online but can't access example is www.123-hdd.com or www.037hd-movies.com When i access it sow message error is.

Hmm. We’re having trouble finding that site.

We can’t connect to the server at www.123-hdd.com.

If you entered the right address, you can:

   Try again later
   Check your network connection
   Check that Firefox has permission to access the web (you might be connected but behind a firewall)

but i try by chrome or microsoft edge can open the website normally. Please help me. how to fix this error.

the update seems to think the only bookmarks i have are Explorer. I don't use that. I use Firefox. All my defaults were gone. Nothing functioned, no browsing the net, nothing. I tried troubleshooter when I bumped into it. There were missing tabs in the update...hidden. I finally tried to pull up help on my phone to fix the desktop situation. It recommended restart. nothing. It recommended clearing the data. Nothing changed. It recommended a refresh. All my bloody bookmarks are gone . TOns of work. WTH firefox?

With vertical tabs and expand on hover, clicking on the X box rarely closes the tab. Sometimes I have success if the pointer is on the left or right line of the box. Not having luck on the center of the box. Has been true for several weeks. With hover off, clicking the X works fine. I am running Windows 11.