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Firefox 13 SLOW to load pages

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Firefox 13 SLOW to load pages

just updated to Firefox 13.0 on my mac last night (no plugins so don't blame them!).. man its SLOW SLOW SLOW. Slow loading pages, Slow to load, and slow to open java (even more so then before!) I have an i5 CPU and 8 GB of 1333 Mhz ram in my macbook pro... whats going on.. seems every new release is slower and slower!

P.S. I switched to chrome because of this.. works lightning fast in comparison!

1 ACCEPTED SOLUTION

Accepted Solutions
Site Moderator

Re: Firefox 13 SLOW to load pages

Create a new profile as a test to check if your current profile is causing the problems.

See "Basic Troubleshooting: Make a new profile":

There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" in case there are still problems.

If the new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.

See:


27 REPLIES
Regular Contributor

Re: Firefox 13 SLOW to load pages

Hey scottyontarion,

I'm sorry you're having trouble with Firefox. So we know it's not your plugins, but a couple of other factors could be slowing Firefox down. Check this list to see: Firefox is slow - How to make it faster Firefox uses too much memory (RAM) - How to fix

Do you have any additional information?

We would also thank you if you can submit us the performance data to get better.

New Contributor

Re: Firefox 13 SLOW to load pages

Hi Rosana, I have the same problem Firefox 13 is extremely slow there are many web sites with not loaded images/css/ and even can't load entire web sites. I tried to disable/enable plugins/extensions/ SPDY but nothing changed. My CPU usage is below 20% and my RAM usage is only 1 GB from all 4GB. My OS is WinXP + SP3 with latest updates.

I checked inaccessible sites/urls with other web browsers and all works perfectly even in Internet Explorer 6 works fine !?

This is for example one url can't be loaded correctly I'm forced to wait and see only white blank window and after 10-15 min page is loaded http://www.adobe.com/software/flash/about/

I'm forced to use another browser and I'll try soon to go back to the FF3.6 and re-import my profile. Sorry but I have no more reasons to use FF13 :-(

New Contributor

Re: Firefox 13 SLOW to load pages

(iMac, i7) Firefox 13 runs just fine when booted. However, if I sit idle and allow my screen to dim, or enter sleep mode...all other programs return to full speed after wake-up except for FF13. Typing text, switching windows, and even quitting the program lags horribly and does not recover to speed. I must force quit and re-open FF13 to get back to functionality, losing anything in shopping carts or text boxes. This is simply not usable, so please solve this quickly. I love Firefox, and it's a pain to export bookmarks. But under the circumstances, I've really got no choice but to start the process of switching to another browser.

Site Moderator

Re: Firefox 13 SLOW to load pages

New Contributor

Re: Firefox 13 SLOW to load pages

I tried to disable IPv6 in Firefox 13, there is some improvement in speed, but it doesn't solve problems. There are still inaccessible and partially loaded web sites.

For partially loaded web sites I need to do 5-6 reloads and wait between each reload until entire page is loaded and fully cached. Cache size is automatic. Page load speed is extremely slow for all web sites that I visit and a lot of images left not loaded with empty place holders. I've checked missing images in about:cache and they are cached but not displayed it's necessary to do many page reloads and wait. All of this makes impossible normal work with FF13.

Example url -> http://www.adobe.com/software/flash/about/ I see this "Transferring data from wwwimages.adobe.com ..." and nothing more.

Site Moderator

Re: Firefox 13 SLOW to load pages

If there are any network.http prefs that are user set then try to reset them.

  • Open the about:config page via the location bar and do a search for network.http via the Search bar at the top of the about:config page.
  • Reset all network.http related prefs that appear bold (user set) via the right-click context menu to their default values.
New Contributor

Re: Firefox 13 SLOW to load pages

my firefox froze up for 25 minutes. i let it sit there just to see how long it would stay frozen. it seems with each update this browser gets worse and worse

Site Moderator

Re: Firefox 13 SLOW to load pages

Create a new profile as a test to check if your current profile is causing the problems.

See "Basic Troubleshooting: Make a new profile":

There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" in case there are still problems.

If the new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.

See:


New Contributor

Re: Firefox 13 SLOW to load pages

Great ! It works and finally I discovered the cause of problems. Many thanks to Cor-el ! Yesterday I decide to go from FF3.6 to FF13 keeping old profile. I checked prefs for network.http and the reason is that Fasterfox Lite 3.9.6 Lite actually breaks all things. All settings and optimizations are fine only for FF3.6 but no more compatible with FF13.

Thanks again Co-rel. Author of Fasterfox Lite must be informed about this issue! This makes unusable FF13.

I only just opened this file (prefs.js) and discover a lot of garbage from old and even uninstalled / removed addons. Not sure but I hope that I shouldn't have more problems from my old Profile.