Getting this message: A website is slowing your browser. Stop it or wait?
Within the past week I am suddenly getting this message (in a yellow bar at top): A website is slowing your browser. Stop it or wait? I click stop it but it doesn't stop it very quickly. I have tried all of the clearing cache/cookies, etc. solutions and nothing is working. I have always set my preferences to clear cookies/cache/history upon closing the browser. Don't know why this is happening or how to fix. Please help... Thank you
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You can check for issues caused by your security software.
Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or userChrome.css is causing the problem.
- switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
- do NOT click the "Refresh Firefox" button on the Safe Mode start window
- https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode
- https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems
Boot the computer in Windows Safe mode with network support to see if that has effect in case security software is causing problems.