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

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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.
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  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:64.0) Gecko/20100101 Firefox/64.0

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WestEnd
  • Top 10 Contributor
59 solutions 5129 answers

Which web page are you on when this happens?

Which web page are you on when this happens?
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Question owner

It was a bing.com page but other web sites can cause this message.

What causes this message to appear?

It was a bing.com page but other web sites can cause this message. What causes this message to appear?
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FredMcD
  • Top 10 Contributor
4081 solutions 56943 answers

”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

”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
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Question owner

So that would mean if no scripts where allowed in a web page that the message should never appear. right?

So that would mean if no scripts where allowed in a web page that the message should never appear. right?
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FredMcD
  • Top 10 Contributor
4081 solutions 56943 answers

That depends on the real cause of the problem.

That depends on the real cause of the problem.
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Question owner

So htat goes back to my original question.

What causes the message "a web page is slowing down your browser" this message appears on all 3 operating systems I use.

So htat goes back to my original question. What causes the message "a web page is slowing down your browser" this message appears on all 3 operating systems I use.
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FredMcD
  • Top 10 Contributor
4081 solutions 56943 answers

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.

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.
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Question owner

That does not answer my question on how Firefox identifies a web site as slowing down.

Does FF have a measurement metric how is it used?

That does not answer my question on how Firefox identifies a web site as slowing down. Does FF have a measurement metric how is it used?
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FredMcD
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4081 solutions 56943 answers

Yes. Firefox keeps watch on the programs(scripts) it is running. If a program runs too long, an error message is displayed.

Yes. Firefox keeps watch on the programs(scripts) it is running. If a program runs too long, an error message is displayed.
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Question owner

What I am still looking for is at what point does FF say "a web page is slowing down your browser"

What would a script have to do or how slow does web site have to slow

What I am still looking for is at what point does FF say "a web page is slowing down your browser" What would a script have to do or how slow does web site have to slow
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FredMcD
  • Top 10 Contributor
4081 solutions 56943 answers

There are settings in the about:config page, but I don't remember what one.

There are settings in the '''about:config''' page, but I don't remember what one.
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Question owner

Is there a list of all about:config parameter?

Is there a list of all about:config parameter?
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FredMcD
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4081 solutions 56943 answers
http://kb.mozillazine.org/Firefox_:_FAQs_:_About:config_Entries
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cor-el
  • Top 10 Contributor
  • Moderator
17102 solutions 154428 answers

See also comments in the Firefox source code.

Note that some preferences are hidden and have a fixed default value and only show on about:config when you give them a value.

See also comments in the Firefox source code. *https://dxr.mozilla.org/mozilla-release/source/modules/libpref/init/all.js *https://dxr.mozilla.org/mozilla-release/source/browser/app/profile/firefox.js Note that some preferences are hidden and have a fixed default value and only show on about:config when you give them a value.
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Question owner

Are firefox users allowed to change or make corrections to source code cor-el?

How can anyone use the source code you proivded?

Are firefox users allowed to change or make corrections to source code cor-el? How can anyone use the source code you proivded?
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kj2008 0 solutions 22 answers

This happens on the New York Times web site (other places too.) I would really like to be able to use it. Pages also load very slowly. On Task Manager it says Firefox (5) or Firefox (6).

This happens on the New York Times web site (other places too.) I would really like to be able to use it. Pages also load very slowly. On Task Manager it says Firefox (5) or Firefox (6).
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FredMcD
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4081 solutions 56943 answers

kj2008 said

On Task Manager it says Firefox (5) or Firefox (6).

More than one process is normal for the current Firefox. http://www.ghacks.net/2016/07/22/multi-process-firefox/

Multi-process Firefox is codenamed "e10s". https://wiki.mozilla.org/Firefox/multiprocess

''kj2008 [[#answer-1209887|said]]'' <blockquote> On Task Manager it says Firefox (5) or Firefox (6). </blockquote> More than one process is normal for the current Firefox. http://www.ghacks.net/2016/07/22/multi-process-firefox/ Multi-process Firefox is codenamed "e10s". https://wiki.mozilla.org/Firefox/multiprocess
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kj2008 0 solutions 22 answers

Good to know about the Firefox (5) or Firefox (6). Could it just be unable to do so many things at once on this computer?

Good to know about the Firefox (5) or Firefox (6). Could it just be unable to do so many things at once on this computer?
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Question owner

I have experimented with reducing the upload speed and noticed the message appears more often.

However I was hoping to find a definitive value. does it count the number of TCP retries?

I have experimented with reducing the upload speed and noticed the message appears more often. However I was hoping to find a definitive value. does it count the number of TCP retries?
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kj2008 0 solutions 22 answers

I am still getting this yellow bar error, often on the NY Times web site. This is not the only place it happens. It also seems to momentarily "forget" that I have logged in. I've looked at Task Manager but don't see what I could do when it says Firefox is using a lot of memory at the time. I don't have much if any extra stuff on Firefox. Using Windows 10 and probably have a slow connection.

I am still getting this yellow bar error, often on the NY Times web site. This is not the only place it happens. It also seems to momentarily "forget" that I have logged in. I've looked at Task Manager but don't see what I could do when it says Firefox is using a lot of memory at the time. I don't have much if any extra stuff on Firefox. Using Windows 10 and probably have a slow connection.
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