Computer Tricks and Secrets

Short answer: Firefox usually slows down from too many extensions and tabs, a bloated profile, or hardware acceleration being off, not from a secret tweak. The genuine fixes are trimming extensions, managing tabs, keeping hardware acceleration on, clearing cache, and, if all else fails, the built-in Refresh Firefox. Here is what actually works. 1. Audit your extensions Extensions are the most common cause of a sluggish Firefox. Open the menu > Add-ons and themes, and remove anything you do not actively use. Each add-on runs in the background and adds up. Use Firefox's built-in Task Manager (type about:processes in the address bar) to see which extensions and tabs use the most memory and CPU. 2. Manage tabs Dozens of open tabs each hold memory. Close what you are done with, bookmark "read later" pages instead of keeping them open, and consider a tab-suspender extension only if it genuinely helps more than it costs. 3. Keep hardware acceleration on In Setting...