Try Firefox from Mozilla and see if you have the same issue.

Also see if you have the same issue on a live usb stick using your distro. X11 or Wayland?

I see your post on your distro forum.

https://forum.endeavouros.com/t/unable-to-hold-backspace-to-delete-multiple-characters-in-certain-text-boxes-in-firefox-124-0-1-1/53020

                `:osssssss+-              OS: EndeavourOS Linux x86_64 
              `:+sssssssssso/.            Host: Victus by HP Laptop 16-e0xxx 
            `-/ossssssssssssso/.          Kernel: 6.6.22-1-lts 
          `-/+sssssssssssssssso+:`        Uptime: 4 mins 
        `-:/+sssssssssssssssssso+/.       Packages: 1945 (pacman), 13 (flatpak) 
      `.://osssssssssssssssssssso++-      Shell: bash 5.2.26 
     .://+ssssssssssssssssssssssso++:     Resolution: 1920x1080 
   .:///ossssssssssssssssssssssssso++:    DE: Plasma 6.0.2 
 `:////ssssssssssssssssssssssssssso+++.   WM: KWin 

`-////+ssssssssssssssssssssssssssso++++- Theme: [Plasma]

`..-+oosssssssssssssssssssssssso+++++/`   Icons: [Plasma], breeze-dark [GTK2/3] 
  ./++++++++++++++++++++++++++++++/:.     Terminal: konsole 
 `:::::::::::::::::::::::::------``       CPU: AMD Ryzen 5 5600H with Radeon Graphics (12) @ 4.280GHz 
                                          GPU: AMD ATI Radeon Vega Series / Radeon Vega Mobile Series 
                                          GPU: NVIDIA GeForce RTX 3050 Mobile 
                                          Memory: 4751MiB / 7277MiB 
                                          Battery0: 99% [Not charging] 
                                          Active GPU: hybrid 

My firefox info from about:support:

Application Basics

Name: Firefox Version: 124.0.1 Build ID: 20240322145831 Distribution ID: archlinux User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:124.0) Gecko/20100101 Firefox/124.0 OS: Linux 6.6.22-1-lts #1 SMP PREEMPT_DYNAMIC Sat, 16 Mar 2024 06:20:33 +0000 OS Theme: / Multiprocess Windows: 1/1 Fission Windows: 1/1 Enabled by default Remote Processes: 11 Enterprise Policies: Inactive Google Location Service Key: Found Google Safebrowsing Key: Found Mozilla Location Service Key: Found Safe Mode: false Memory Size (RAM): 7.1 GB Disk Space Available: 53.9 GB

Crash Reports for the Last 3 Days

Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or if userChrome.css/userContent.css is causing the problem.

• switch to the Default System theme: "3-bar" menu button or Tools -> Add-ons -> Themes
• do NOT click the "Refresh Firefox" button on the Troubleshoot Mode start window

• https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode
• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

X11 or Wayland?

X11.

Start Firefox in Troubleshoot Mode

I've already done so with no luck.

Try Firefox from Mozilla and see if you have the same issue.

The issue is still occurring with that version of Firefox.

I just tested on Wayland, and the issue is absent.

I'm also having this issue and i think this might be due to the new release of KDE 6 ? i'm on Arch Linux and i wasn't having this issue before KDE 6 on X11. It seems like the original poster was able to go around the issue by using Wayland but i cannot use Wayland atm due to multiple reason and i am stuck on X11. Also i want to point out that we both use an Nvidia GPU if that changes anything.

I downloaded Firefox beta and the issue was absent however i would like to utilize Firefox stable release instead of the Beta version.

Another thing that i noticed is that the backspace only delete one character(if i press it without release) on google or youtube but it works on duckduckgo in a very buggy manner. For example when i press backspace in duckduckgo search bar, it will delete the first character then it will wait for maybe a whole second then start deleting the other characters at a very slow and buggy pace. Typing anything the search bar at this link https://support.mozilla.org/en-US/products/ will also work if i press backspace but it will be a bit laggy and slow just like on the duckduckgo search bar.

I tried in a new profile, i tried completely deleting the .mozilla cache from my home directory and my cache directory. I also tried what one of the poster said earlier about enabling troubleshooting mode and disabling hardware acceleration because i also thought maybe it had something to do with it but it still does it

Typing anything on the main search bar of the firefox browser will work without an issue, its really just webpages text box that are having an issue with the backspace

Somehow firefox beta works and i'm typing this message from the floorp browser.

It doesn't happen for me with X11 on Ubuntu.

I downloaded Firefox beta and the issue was absent

Did you try the Mozilla release build?

Does it still happen with the flatpak package?

It doesn't happen for me with X11 on Ubuntu.

moicx1 said

I downloaded Firefox beta and the issue was absent

Did you try the Mozilla release build?

Does it still happen with the flatpak package?

so i tried the mozilla release build and the issue is still present but it's not on the flatpak package

sorry it took a while to respond, i thought i would have gotten an email if someone responded

You can run mozregression between 124 and 125 to find the fix.

You can run mozregression between 124 and 125 to find the fix.

it doesn't do the bug when i do it with this software

i tried with 124-125 and now i just tried 123-124 and they both work. I think it maybe related to the arch official package itself or something to do with KDE 6, i'm not really sure.

New changes are often tested for a few cycles on Nightly before being released so you may need to go back a few versions.

You can run mozregression between 124 and 125 to find the fix.

Here's the final stage of my mozregression output:

7:36.30 INFO: No more integration revisions, bisection finished.

7:36.30 INFO: Last good revision: ccaccfe2cb77380846b2d6c5ab5cc3da4ab5cb33
7:36.30 INFO: First bad revision: 63cb54db7879e0d226fb023288e30a0e22ca204f
7:36.30 INFO: Pushlog:

https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=ccaccfe2cb77380846b2d6c5ab5cc3da4ab5cb33&tochange=63cb54db7879e0d226fb023288e30a0e22ca204f

Looks like this is the culprit changeset

My final mozregression ouptut:

7:36.30 INFO: Narrowed integration regression window from [ccaccfe2, 1dc1bad3] (3 builds) to [ccaccfe2, 63cb54db] (2 builds) (~1 steps left)
7:36.30 INFO: No more integration revisions, bisection finished.
7:36.30 INFO: Last good revision: ccaccfe2cb77380846b2d6c5ab5cc3da4ab5cb33
7:36.30 INFO: First bad revision: 63cb54db7879e0d226fb023288e30a0e22ca204f
7:36.30 INFO: Pushlog:

https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=ccaccfe2cb77380846b2d6c5ab5cc3da4ab5cb33&tochange=63cb54db7879e0d226fb023288e30a0e22ca204f