content: Nothing, really. In my opinion it's currently the best browser out there, and I used to think Chrome was better for many years. I'd been using only Chrome until Firefox Quantum came out, and that was a huge step forward. The "new" Firefox is only a couple years old now, but I've been using it almost exclusively this whole time... I don't even feel like using Chrome ever again. 10 years ago Chrome was leaps and bounds faster than all other browsers, and Firefox tried very hard to catch up, and I think it finally started to show. Also I use Linux, and Firefox is rather "native" on Linux, whereas while Chrome does work on Linux, it seems to have some Windows-specific features.