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firefox 4 doesn't support mac os 10.4.11, when will it be available? i can't afford a new os system.

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this is what i'm getting when i try to use yahoo news: Sorry, Bad Request. Your browser sent a request that this server could not understand.

Size of a request header field exceeds server limit.

this is what i'm getting when i try to use yahoo news: Sorry, Bad Request. Your browser sent a request that this server could not understand. Size of a request header field exceeds server limit.

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This issue can be caused by corrupted cookies.

Clear the cache and the cookies from sites that cause problems.

"Clear the Cache":

  • Firefox > Preferences > Advanced > Network > Offline Storage (Cache): "Clear Now"

"Remove Cookies" from sites causing problems:

  • Firefox > Preferences > Privacy > Cookies: "Show Cookies"
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tried it, and this doesn't help.

still getting message "Sorry, Bad Request. Your browser sent a request that this server could not understand.

Size of a request header field exceeds server limit."

and the cookie that message shows is not in my cookie list.

also, your reply doesn't answer the main question - when will firefox offer an upgrade for mac ox 10.4.11 users? the sites i'm having problems with say i need to upgrade to firefox 4, but firefox 4 doesn't support os 10.4.11

not cool!

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If clearing the cookies doesn't help then it is possible that the file cookies.sqlite that stores the cookies is corrupted.

Rename (or delete) cookies.sqlite (cookies.sqlite.old) and delete cookies.sqlite-journal and cookies.txt, if they exist, in the Firefox Profile Folder in case the file cookies.sqlite got corrupted.


There won't be any new Firefox versions released for Mac OS X 10.4 and especially not for Macs with a PowerPC processor.
The Firefox 3.6.x versions are the last Firefox versions that will run on PPC and there won't be many more security updates.

For an unofficial Firefox 4 compatible version (TenFourFox) that runs on PowerPC Macs with OS X 10.4.11 or OS X 10.5.8 you can look at: