"A web page is slowing down your browser. What would you like to do?"
It only appears in Firefox when opening up facebook.com news feed. Here's what I do: - Open facebook.com as usual - Scroll down the news feed - A warning appears for a few seconds and the page does not respond - Then the warning disappears and the page responds again - Continue Scroll down the news feed - And warnings reappear, and so on
The problem still happens in Safe Mode.
Specification: Windows 7 Ultimate (64 bit) Firefox 63.0.3 (64 bit)
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”Webpage is slowing down your browser” This is the new way the browser tells you there is a problem with the script program(s). https://support.mozilla.org/en-US/kb/warning-unresponsive-script?cache=no
Many site issues can be caused by corrupt cookies or cache.
- Clear the Cache and
- Remove Cookies
Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.
- Cookies; Delete cookies to remove the information websites have stored on your computer {web link}
- Cache; How to clear the Firefox cache {web link}