This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

"a web page is slowing down your browser" why?

  • 31 odgovor
  • 5 ima ovaj problem
  • 20 views
  • Posljednji odgovor poslao lamrwee

more options

I have noticed the the yellow message "a web page is slowing down your browser" What triggers this message in FF.

I have noticed the the yellow message "a web page is slowing down your browser" What triggers this message in FF.

All Replies (11)

more options

kj2008 try "about:performance" because even though I think the problem may be re-trannsmission I see it at times that do not seem to be a throughput problem.

more options

Mace2 - What do you mean?

more options

If you run "about:performance" since it happens frequently for you I am hopping the stats might show a performance degradation but I am not sure.

more options

What is about:performance?

more options

This message is probably about the website taking a lot of CPU time, probably on the main processor thread. I don't know which tasks run on the main thread and which run asynchronously on their own thread. I would assume that about:performance (Task Manager) shows that a tab uses a lot of processor time.

This specific message is about the Process hang reporter. When the browser hangs and doesn't return control then this warning bar is displayed

more options

I want to automatically stop a non-responsive script without having to do anything. Is this possible?

more options

I have noticed a issue in which if you are watching a Youtube videos that a response via http to a site map2.hwcdn.net which works out to IP (205.185.216.42 causes a large amount of retries to the network causing congestion.

I do not know exactly how the map2.hwcdn.net site gets engaged but even though the network retries are massive causing intermittent play of anything in FF . But FF does not notify that a site is slowing down your browser.

more options

It just happened on Outlook.com after updating FF to 67.0.2.

There do not seem to be solutions to many ongoing problems. What does a long-time FF user do?

Frustrated... One day, I might get around to explaining what happens when I use clear cache and remove cookies.

Thank you.

more options

Mace2 said

I have noticed the the yellow message "a web page is slowing down your browser" What triggers this message in FF.

FredMcD said

https://support.mozilla.org/kb/Clear+Recent+History#w_how-do-i-remove-a-single-website-from-my-history Remove History For One Site Open the History Manager <Control><Shift> H. In the search bar, enter the name of the site. Right-click on one of the listings and select Forget About This Site. This should remove all information, including any passwords / settings.
more options

lamrwee said

Mace2 said
I have noticed the the yellow message "a web page is slowing down your browser" What triggers this message in FF.

FredMcD said

https://support.mozilla.org/kb/Clear+Recent+History#w_how-do-i-remove-a-single-website-from-my-history Remove History For One Site Open the History Manager <Control><Shift> H. In the search bar, enter the name of the site. Right-click on one of the listings and select Forget About This Site. This should remove all information, including any passwords / settings.
more options

lamrwee said

Mace2 said
I have noticed the the yellow message "a web page is slowing down your browser" What triggers this message in FF.

FredMcD said

https://support.mozilla.org/kb/Clear+Recent+History#w_how-do-i-remove-a-single-website-from-my-history Remove History For One Site Open the History Manager <Control><Shift> H. In the search bar, enter the name of the site. Right-click on one of the listings and select Forget About This Site. This should remove all information, including any passwords / settings.

This only works if you actually know which web page is lsowing down your browser and Firefox/Mozilla does not tell you this and if you do what this reply was you do not know which to forget about. All I know is that ever since there was an upgrade to Mozilla then the site I have used for the last ten months always has this message attributed to it now when before it was never there. I need to use this site everyday since I teach online English and I need it for my work. So this looks like a problem with Mozilla/Firefox software that they need to address soon or I will be returning to my previous search engine and deleting my Firefox/Mozilla account, and I was just starting to like Firefox/Mozilla because it had been very dependable and fast.

  1. 1
  2. 2