A great browser that deserves to be supported - because Rust exists and because Chrome doesn't deserve a monopoly.
https://www.reddit.com/r/FirefoxCSS/comments/hyq315/update_to_minfox_theme_clean_and_minimal_firefox/ minifox, an updated firefox theme
https://www.reddit.com/r/FirefoxCSS/comments/hneh2u/a_blurred_transparent_and_modern_looking_theme/ transparent firefox theme
Solid with basic Vim commands. I've used it for a long time.
Command palette and more! Trying this one out. Looks super configurable but I have yet to do so.
Vimium + more shortcuts and built in editor. Hate the history navigation though.