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.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

~ 50% of the open Tabs generate a "File not found" on restart

  • 1 jibu
  • 2 wana tatizo hili
  • 9 views
  • Last reply by c33s

c33s
c33s
more options

since firefox4 (also applicable for firefox 4.01 and 5.0) i get a lot of "file not found" errors when i open firefox and firefox restores the session. with firefox 3.x i don't had this error.

if only ~3 tabs are open, there everything is loaded without problem but most of the time i have >15 tabs in the session and about 50% of them are loaded with the "file not found" error.

i tried some of the solutions i found in the forum:

  • disabled ipv6
  • disabled dns prefetch
  • disabled all plugins/addons (created a new profile)
  • disabled proxy

the firewall is correctly configured, other browsers work without problems (even firefox 3.5).

since firefox4 (also applicable for firefox 4.01 and 5.0) i get a lot of "file not found" errors when i open firefox and firefox restores the session. with firefox 3.x i don't had this error. if only ~3 tabs are open, there everything is loaded without problem but most of the time i have >15 tabs in the session and about 50% of them are loaded with the "file not found" error. i tried some of the solutions i found in the forum: * disabled ipv6 * disabled dns prefetch * disabled all plugins/addons (created a new profile) * disabled proxy the firewall is correctly configured, other browsers work without problems (even firefox 3.5).

All Replies (1)

c33s
c33s Mwenye swali
more options

a solution for me was:

options > advanced > network - override automatic cache management - limit cache to 0 MB of space

it looks like the problem is in the local caching, if the cache is turned on, the browser looks in the disk cache if the file is found, if not it generates an 404 and does not lookup the data on the internet.

after turning off the local disk cache, everything works again.

@mozilla: please add a bugfix