Watch Firefox on YouTube in 720p without lag problems.
Watch Firefox on YouTube in 720p without lag problems.
Hello, I frequently use Firefox but now experiencing lag when watching YouTube videos in fullscreen. 1080p is acceptable, while 720p struggles under fullscreen mode. I disabled hardware acceleration and expected the issue to resolve, but it persists.
Your system specs are: FX 6100, 6-core processor, 8GB RAM, Radeon 6870. It seems this isn't typical for your computer since Chrome works fine there. You mentioned preferring Firefox over Chrome, which is good.
Google Chrome might seem okay but still causes issues, while Firefox handles it better. Try removing Adobe Flash from Programs & Features and re-downloading it from the official site. This often resolves the problem. If that doesn’t work, ensure Firefox is current—recent updates include WebM support for HTML5. Check the "About Firefox" option to see if updates are available. If still not resolved, verify the player setting is set to HTML5 (Firefox supports WebM in stable versions but not all dev builds). For more info, refer to this guide: https://www.youtube.com/html5
I experienced similar problems with Firefox and YouTube in the past, where the same segment would repeatedly buffer without playing properly. This issue occurred with Waterfox, Cyberfox, and the regular version, but Firefox Beta 38.0.5 appears to work without problems.