[mbesto]

Same here - made a switch and switched back quickly after.

1. Compatibility - random sites would just break...I reckon 15% of the time

2. Battery life - FF destroyed my battery life. To the tune of 8 hours on Chrome vs like 2 on FF.

[tempestn]

Did you have add-ons in Firefox? I almost never have sites break—certainly not anywhere near 15% of the time. And at least 95% of the time I've had issues in the past, it has turned out to be an add-on causing problems, rather than the browser itself. (Ad blockers would be the first thing to check in the case of random breakages.)

[zaarn]

I don't think 15% is accurate, I only know of 1 site that breaks under Firefox and that is operated at minimum budget by a chinese electronics shop. I've literally never found any other site that broke on Firefox.

[reciprocity]

I suspect more detail regarding your setup would prove to be useful for context as neither one of your bullets point towards an issue with Firefox directly.