So I'm having this white border around my Firefox and it only shows when I go to some webpage, there isn't that border when I go to new tab. I'm using user.js template from https://github.com/ghacksuserjs/ghacks-user.js. Any ideas how to remove that border?
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Fixed, just add/edit this to user.js to false, there might be some fingerprinting issues but that border annoyed me:
user_pref("privacy.resistFingerprinting.letterboxing", false);
