Firefox opens pages slowly every time after I used it for months
My Firefox opens pages slowly every time after I used it for months, and clearing the cache doesn't help. However, if I create and use a new profile, it gets fast again. What could be the problem?
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Start Firefox using Troubleshoot(Safe) Mode {web link}
A small dialog should appear. Click Start In Troubleshoot(Safe) Mode (not Refresh). Is the problem still there?
Yes, still there
Start your Computer in safe mode with network support. Then start Firefox. Try Secure websites. Is the problem still there?
Starting Any Computer In Safe Mode (web link) Free Online Encyclopedia
https://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/
https://www.digitalcitizen.life/4-ways-boot-safe-mode-windows-10/ +++++++++++++++++++++++++++++++++++++++++++++++ If the problem goes away with the computer in Safe Mode, the problem is with one of the other programs on the system.
As a test, disable your protection programs.
How many history visits do you have ?
You can check for issues with the places.sqlite and favicons.sqlite databases in the Firefox profile folder.
- use the "Places Database" -> "Verify Integrity" button on the "Help -> More Troubleshooting Information" (about:support) page
If errors are reported with "Verify Integrity", close and restart Firefox or reboot and retry.