[FIREFOX 143] bookmark_icons_colorized not work anymore

### Guidelines

- [x] I have read [how to report a new issue](https://github.com/Aris-t2/CustomCSSforFx/issues/4)
- [x] I have used the [latest release](https://github.com/Aris-t2/CustomCSSforFx/releases/latest)
- [x] I have set the `toolkit.legacyUserProfileCustomizations.stylesheets` in `about:config` to `true`

### Does the issue occur without any files inside /chrome/ folder?

Yes

### Description of the Issue

bookmars icon are not colorized anymore

### Issue description, userChrome.css/userContent.css 'settings' the issue occurs with and steps to reproduce the issue

bookmark_icons_colorized stop working (I suppose)

### Does the issue occur with the most recent version of CustomCSSforFx (release/test/dev build)?

Yes, with the latest release

### Screenshots showing the issue

### System information

- OS & OS version: Windows 11
- DPI/HiDPI/scaling value, if not 100% (e.g. 125%, 150%...): 100%
- Firefox version: 143
- Firefox theme (e.g. default, build in light/dark, external theme + link): default

Start by locating the bookmark_icons_colorized setting in the repository and reproduce the problem with Firefox 143, using the reported default theme and Windows 11 setup as context. Done means bookmark icons are colorized again when the setting is enabled; no specific file or test is named in the issue.

Written by the indexing model from the issue text.