Firefox-Mod-Blur VS uc.css.js

This is my first time doing something like this. I though I just need to add files to the chrome folder, but that doesn't work(at least for some files). 2 files that should hide my extensions and hide my bookmarks doesn't work. Can anyone help me? I've followed instructions from here.

Here

Yep! Use the privacy mod here and place it in your userChrome. You have the option of having blurred out email in the main menu, sync menu, or change the email in the main menu to any other text you want

You can find more information on extra features and code here https://github.com/datguypiko/Firefox-Mod-Blur

I've been struggling hard with trying to make my address bar suggestions box transparent. I got inspired by [datguypiko's Firefox Mod Blur], and wanted to implement some of the transparency stuff into my userChrome.

try that code but first download this image

I use the theme from here without any changes.

Not true, here is an example using it for the search bar. I use this with sway wm which does not support blur.

I'm using this script which enchances the all tabs menu functionality of FF.

Woah, this is nicely packaged. Even has "Releases"! Thank you! https://github.com/aminomancer/uc.css.js

Yes. It is possible, but you will have to set up a JavaScript loader. See this GitHub page for more info. https://github.com/aminomancer/uc.css.js

UI customization is fortunately still alive in the wake of XUL extensions.

A /r/firefoxcss mod has a wonderful collection of code snippets that they maintain, which you can browse here: https://mrotherguy.github.io/firefox-csshacks/ and they created a userChrome.js loader here: https://github.com/MrOtherGuy/fx-autoconfig

My favorite customization repository is https://github.com/aminomancer/uc.css.js - which really tests the limits of what is and isn't possible with userChrome.css and .js. My favorite feature is the implementation vertical tabs, without the use of extensions.

Some legacy extensions are maintained and can be found here: https://github.com/xiaoxiaoflood/firefox-scripts/tree/master... (although you will need to use xiaoxiaoflood's userChrome.js loader AFAIK).

Honorable mention goes to the Firefox CSS Store, which can be found here: https://trickypr.github.io/FirefoxCSS-Store.github.io/

Moving to WebExtensions was the logical choice for Firefox, technical/security reasons aside, as they are not alienating extension developers that target Chromium-based browsers.

Yes, they alienated their own extension developers. Yes, they could've handled the transition better, and worked harder towards supporting some of the many APIs/functionalities that extension developers needed (or still need) for their extensions to work in the WebExtensions ecosystem. I myself was quite mad for a very long time at how they handled the switch, but I think overall it's been a success - my own personal feelings aside.

Linux support is pretty good these days and it's just as customizable as Vivaldi. See this repo for an example: https://github.com/aminomancer/uc.css.js