[gruez]

You don't even need to make your own extension, which requires a bunch of boilerplate and docs. Userscripts (eg. greasemoney) or userstyles (eg. stylus) is often all you need, and much more straightforward to make.

[QuadmasterXLII]

Is there a browser with native userscripts? because if I install a userscript extension, its just going to get push-updated to add malware like OP