cancel
Showing results for 
Search instead for 
Did you mean: 

Firefox 18.0 is too slow

SOLVED
Highlighted
New User

Firefox 18.0 is too slow

Not really a question, more of a plea...

Firefox 18.0 crawls on my machine. Not the browsing as such; that's only a little slower than 17.0.1 (still noticeable). I'm talking about opening and traversing menus and entering text in text fields on sites. I had to go back to 17.0.1 as it was just too annoying. This is on Linux Mint Debian Edition (Debian Testing), using the nl localized Firefox downloaded from the Mozilla site. Switching off extensions and/or using a new profile didn't help. If this doesn't get any better in following versions, I'll have to look for another browser when 17.0.1 becomes too old. Please don't make me do that. I've just tried Chrome and quite frankly, it's a bit of a joke...

1 ACCEPTED SOLUTION

Accepted Solutions
Site Moderator

Re: Firefox 18.0 is too slow

it should be fixed in firefox 19 which is going to be released on tuesday feb.19. if you'd like you can also test it right now by switching to the beta version: https://www.mozilla.org/firefox/channel/

edit: and just for reference, this appears to be bug #832641 (please don't post in bug reports)

40 REPLIES

Re: Firefox 18.0 is too slow

Hello grizzler,

Try to Turn off hardware acceleration, and check it again (in safe mode hardware acceleration is disable).

Try to Change the home page Try to Change how windows and tabs are loaded Try to Check your antivirus software

Please let us know if any of these tips solve your problem

Thank you

New User

Re: Firefox 18.0 is too slow

Makes no difference, I'm afraid.

Site Moderator

Re: Firefox 18.0 is too slow

A possible cause is security software (firewall,anti-virus) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.

Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.

See:


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

See "Creating a profile":

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

New User

Re: Firefox 18.0 is too slow

Look at my original post. A new profile has already been tried. And even though I fail to see how disabling the firewall could affect building and traversing Firefox's menus (which is where the slowness is most annoying), I switched off iptables just to be sure. No change of course.

Site Moderator

Re: Firefox 18.0 is too slow

Sorry about those suggestions. I appear to have missed that you are on Linux.

Any luck with disabling IPv6?

New User

Re: Firefox 18.0 is too slow

The setting network.dns.disableIPv6 has been set to true for ages.

New User

Re: Firefox 18.0 is too slow

It's JavaScript/Flash. I just tried 18.0.1 and it seemed acceptable at first. But after the first Flash movie the same slowness crept in (bookmark menu taking seconds to open, traversing the menu with the highlighted item lagging up to five items behind the mouse pointer). Could be that new JavaScript engine is broken in some way or simply requires much more 'horse power'. Back to 17...

Site Moderator

Re: Firefox 18.0 is too slow

hello, maybe it's an issue with the protected mode in the flash plugin - you could try if downgrading to flash 10.3 (which is still supported) or disabling protected mode makes a difference.

New User

Re: Firefox 18.0 is too slow

Downgrading didn't make any difference and neither did disabling protected mode (assuming adding the command mentioned to /etc/adobe/mms.cgf did the trick).

Thanks for your suggestions anyway.