Firefox starts to use 50% of processor every day and must be shutdown and restarted to correct.
Firefox, everyday if it is used, will begin consuming 50% of processor (when viewing task manager). It has happened multiple times during the day. Restarting Firefox corrects the problem. It slows both Firefox and any program being run. If Firefox is shut down, the computer does not slow down. Processor hogging seems to occur while Firefox is being used as opposed to when it sits and other programs are being used. Multiple anti-virus scans have been done on the system and no problems have been found. This same thing occurred with Version 27 and 29.
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Try Firerfox in it's safe mode and with all plugins disabled, if that helps maybe enable the addons one at a time as you do not have many and you could find one of those is a problem.
See also
- Firefox uses too much memory or CPU resources - How to fix
- Diagnose Firefox issues using Troubleshoot Mode
- Disable or remove Add-ons
Turn on telemetry, so engineers get anonymised results of your problems. it will not give you any immediate fix but it helps with improving Firefox and identifying problems