https://addons.mozilla.org/en-US/firefox/addon/single-file/
https://addons.mozilla.org/en-US/firefox/addon/chrome-ua-on-...
https://addons.mozilla.org/en-US/firefox/addon/top-and-botto...
Without these three, its jarring to use Firefox for me. But there is no other user in the world with my browsing habits. After including the most used extensions, Mozilla is showing no interest in getting more extensions. It's quite frustrating.