error message: web pageis slowing down your browser...stop/wait
web page slowing down your browser:
'''web page slowing down your browser:
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https://support.mozilla.org/en-US/kb/firefox-crashes-troubleshoot-prevent-and-get-help
We have recently seen multiple reports that Bitdefender is causing issues with tab crashes in Firefox 73.
It looks that Bitdefender has pushed an update to address this issue 21 Feb 2020