How to reduce spaces in the context menu with userChrome.css? Any help is appreciated.
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I suspect that you’ll find answers here:
https://old.reddit.com/r/firefox/comments/7dvtw0/guide_how_to_edit_your_context_menu/
That link came from more documentation here:
https://www.howtogeek.com/334716/how-to-customize-firefoxs-user-interface-with-userchrome.css/