Fórum podpory Firefox

I'm trying to take off this "Extension (Tabliss)" tag on my url. I have followed the instructions down below from another Firefox support forum: https://discourse.mozilla.org/t/make-addressbar-text-extension-name-of-the-extension-shorter-or-hide/28026/3

The instructions I followed are listed below:

"Users can apply custom style rules to modify Firefox’s toolbar area by creating a userChrome.css file. This takes about 10 minutes so when you have time to take it slowly and carefully:

(1) Set up your chrome folder and userChrome.css file following the five six steps in this article:

https://www.userchrome.org/how-create-userchrome-css.html 45

I have a boring video there if you like demonstrations.

(2) This is the code to paste into the file. You can edit the file using Notepad or a better editor. Make sure to keep it in a plain text format with a .css file extension (not .css.txt).

See improved rule down in: Make addressbar text "Extension (Name Of The Extension)" shorter or hide

/*
   Hide Extension Name in the identity area unless
   hovered for half a second (updated for Fx80)
*/
#identity-box.extensionPage #identity-icon-labels,
#identity-box.extensionPage #identity-icon-label {
  visibility: collapse !important;
  transition: visibility 250ms ease-in-out;
}
#identity-box.extensionPage:hover #identity-icon-labels,
#identity-box.extensionPage:hover #identity-icon-label {
  visibility: visible !important;
  transition: visibility 250ms ease-in-out 500ms;
}

(3) Firefox should read the file at its next startup and apply it to every extension page you load."

Edit: So, yeah, I need help getting this tag off. I'm new to Firefox so it could be something obvious I'm missing. I have also tried CTRL+SHIFT+R to reload the page for changes and also closed and reopened my Firefox entirely.

Thanks in advance.

I've discovered that in my Users/UserName/AppData/Local/Temp folder, there are thousands of files eating up space with name "cubeb-shm-#####-#####-input" and "cubeb-shm-#####-#####-output", where "#####-#####" is a 10 digit number seperated by a hyphen.

I did a basic google search for these filenames and found several articles that talk about how firefox uses these, and normally creates and then deletes them, so there should only ever be one of each (input/output) file at a time. For some reason, I have thousands of these files, and they are eating up hundreds of Gb's of space on my hard drive. I only discovered this because my computer notified me I was running out of space. I manually deleted them, but I don't want to have to do this regularly, since it seems it's not expected behavior for Firefox.

I'm running the 64 bit version of Firefox 85.0.2, and there are no new updates available at the time of this writing. I'm really hoping someone can help me figure out how to get Firefox to appropriately manage these files. Help me Firefox community! You're my only hope!