This browser slows down, the video shows at the lowest possible quality, depends on the RAM and the speed of the net. I've put on an opera, a video in quality, it's not stupid. I'm not advertising opera, I just stupidly switched. I share my experience, firefox is a terrible brake with the worst video quality, it feels like they are mining on your computer. The question for these is the same-why is the video quality better and faster in other browsers?. The fox has gone down, believe me, I do not advise it. I've been sitting on a fox for 14 years, they've gone down
The poor Monster has been fainting for several years. My former favorite browser. It's completely rolled down. Fainting always and everywhere. On a Macbook, on a PC, on a tablet, in smartphones. Sorry. But the first one always refused to work on the "outdated" Mac OS. "Progressed." Sorry about the browser.