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Error message: A webpage is slowing you browser. Do you want to wait or stop it?

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When using web mail the cursor freezes and I get a yellow error bar saying a web page is slowing my browser and asks whether I was to "wait" or "Stop it". I stop it and all is fine. How do I find out what is happening or what site is causing this problem in FireFox. It never happens in Chrome or Edge. Ken Gal 2:20

When using web mail the cursor freezes and I get a yellow error bar saying a web page is slowing my browser and asks whether I was to "wait" or "Stop it". I stop it and all is fine. How do I find out what is happening or what site is causing this problem in FireFox. It never happens in Chrome or Edge. Ken Gal 2:20

All Replies (2)

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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

https://support.mozilla.org/en-US/kb/task-manager-tabs-or-extensions-are-slowing-firefox

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The links are interesting but doesn't solve my problem to tell me in an a way useful to me. The problem just happened, I learned how to turn of Mozilla's task manager but there is no explanation of how to identify the web site that is the problem. The task manager give info, but so obvious course of action or identity of the offending site. I need a simple answer, not a link to pages of complicated solutions to a long list of issues.