"It has to be Chromium"
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I use firefox for obvious privacy reasons but also because I can customize the UI. Chromium's interface is oversized, ugly, and locked down while on firefox I can change any aspect of it using my own CSS.
Also addons against ads which Google obviously wouldn't allow on their crap browser.
I initially read your comment as "I use firefox for obvious piracy reasons" and thought "yeah, that's fair".
How are you doing this? Firefox's stock UI is even more oversize than Chrome's and they are actively removing customization options to the UI.