I can be very specific. This has been a problem for me for a bit over a year now. I am currently running SUSE Leap 42.1 w/ FF 48.0.1. I had been running 13.2. I have been running a 4 core 3.? GHz CPU (AMD) for the whole time, having added a primary SSD for swap (14GB). I also have 8GB RAM.
I have multiple FF windows open, pointing to various locations (2-16 tabs per window). Linkedin (which has its own problems). My gateway server (which I can config via web browser), etc. Flash causes me to have problems immediately, and so I have flash disabled. When FF finally slows down to where I can't type a message such as this, I Kill it, and restart it, only touching the pages I need immediately. Eventually it will slow to a crawl again. Right now it is using (per top) 106% of the system. If it were using 390%, it would be using all 4 cores and nothing would respond. But as long as FF is not using more than 2 cores, all other windows for other applications will respond nearly immediately. I've also noticed that FF appears to have a memory leak. Right now top is showing 5902668 for Virt and slowly climbing. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/38131 Title: Firefox causes massive Xorg CPU usage Status in Mozilla Firefox: Expired Status in firefox package in Ubuntu: Triaged Bug description: --- Proposed workaround: use Option "AccelMethod" "exa" in device section of your xorg.conf ---- Since installing Dapper Flight 6 last week, I've been plagued by an extremely slow Firefox, though this problem was not present in my previous Dapper install that had, at one point, been Breezy. When running top, I've found that Xorg tends to take up 60%+ of the CPU with the remaining percentage being devoted to Firefox, or sometimes vice versa. This prompted me to edit my xorg.conf. I found that my default config file listed the Device Driver as 'nv' instead of 'nvidia' as it always had been on my machine before I installed Flight 6. Reading advice in https://launchpad.net/distros/ubuntu/+source/firefox/+bug/32561 ( also prompted me to add MOZ_DISABLE_PANGO=1 to /etc/environment. I don't report bugs very often, so I'm not sure on the policy of providing a fix for a problem within the main bug report. :P To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/38131/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
