User Agent: Mozilla/5.0 (Windows NT 5.1; en; rv:2.0) Gecko/20100101 Firefox/4.0 Opera 11.64 Steps to reproduce: I'm browsing the main page of: http://www.sanmayce.com Actual results: The page background is disappeared after the middle of the page. Expected results: The pattern used for the page background must be visible on the entire page. The last version on Firefox that loads the page properly is 3.6.28.

WFM in firefox 20 and firefox 23. Closing this as WFM, please reopen if you can reproduce this in a supported version of firefox. Firefox 4.0 has been EOL since early 2011.

I'm using the last available version 20 of Firefox and the described problem is still there. The OS is Windows XPpro32 with SP3.

Ah, you're faking your ua string. Can you reproduce it in safe mode? https://support.mozilla.org/en-US/kb/Safe+Mode

Comment on attachment 733732 [details] Page_Background_Problem.jpg Browser Firefox version 20 The OS is WinXPpro 32-bit with SP3

One moment please!

The problem exist in the Safe Mode too.

1. The problem is 100% reproducible 2. It's visible on all of the provided 3 screenshots 3. It's happening all the time without an exception with FF version 20 4. The provided link revealed the problem 5. The last working FF version is 3.6.38 6. The OS is Windows XP Pro (32-bit) with SP3

HWa is surely disabled on your machine, that's why you see this issue in normal & safe modes.

Nope! The Hardware Acceleration was enabled all the time while I’m experiencing the described problem. gfx.direct2d.disabled -> false Also when the HWA is disabled (gfx.direct2d.disabled -> true) the problem remains. PS: In my previous comment the last version that works is 3.6.28 (3.6.38 was a typing error).

Because you're using HWA (Cairo) with GDI, not Direct2D which ist not available on Win XP. It's a bug in Cairo-GDI, not Cairo-Direct2D.

With HWA (Enabled) from the menu (Tools->Options..) the problem is still available, btw it was enabled all the time. When the HWA is disabled the situation is the same. No change and when it’s enabling again and after restart.

As I said, I'm able to repro the issue, which is exactly bug 671302.

Unfortunately for me the bug 671302 is not fixed yet. From what you said in Comments #9 & #11 it seems that the only workaround is Cairo-GDI HWA to be enabled. Is there a way Cairo-GDI HWA to be enabled under XP (32-bit) with SP3?

This nasty bug is appeared after version 3.6.28 under XP (32-bit) with SP3. Until now there is no solution for me and I have only two choices: 1. To stay with ver. 3.6.28 2. To use another browser Unfortunately 3.6.x is not supported long time ago and in practice I have to stop the use of FF until the bug 671302 is not fixed. It is so pity. Good luck, guys!

As I said, Firefox uses GDI API for HWA on Win XP. And there is a bug in Cairo-GDI, that's why you see the issue with HWA on. This bug is minor, it's only affect websites with über long background, which is not common.

I added a screenshot with the HWA when it’s disabled. Just for the record, under XP Pro (32-bit) with SP3 when: 1) HWA is Enabled – the problem Exist 2) HWA is Disabled – the problem Exist The page background is damaged in the both modes - with or without HWA.