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Firefox 48.0* ceasing updates for computers without SSE2 support?

  • 4 replies
  • 1 has this problem
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  • Last reply by philipp

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I have a PC with a AMD Sempron 3000+ ; when I have update the 47.0a2 to 48.0a2 it won't start and I got the message : Coun't load XPCOM

I seach to fill a bug and I found a other user with the same issue : https://bugzilla.mozilla.org/show_bug.cgi?id=1266791

I have not this issue on an other machine with a P4 Intel processor

I have a PC with a AMD Sempron 3000+ ; when I have update the 47.0a2 to 48.0a2 it won't start and I got the message : Coun't load XPCOM I seach to fill a bug and I found a other user with the same issue : https://bugzilla.mozilla.org/show_bug.cgi?id=1266791 I have not this issue on an other machine with a P4 Intel processor

All Replies (4)

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I'm not sure anyone here will be able to answer that, as AMD processors are far less common than Intel processors.

Someone participating in the bug may be asked to find a regression range to help narrow down the change that is causing the problem (I think this involves testing various nightly releases until you find the last one that works).

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a2 is the Aurora and not the Nightly (a1) channel builds.

Looks like some regression period testing is being done on both Aurora (a2) (aka developers edition) and Nightly (a1) channel builds.


I know Mozilla is looking to drop support for the Mac OSX 10.6, 10.7, 10.8 in August and mentioned here but I have not seen anything about changes with requirements with SS2 and such. Unless there is some connection with that based on the old CPUs being used with OSX 10.6 and could not use newer OSX because of CPU used. This time period coincides with the Firefox 48.0 Release. Coincidence? I am not going to go dig around in bugzilla to see if there is a connection.

Modified by James (doing minimal support dowdays)

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It looks like a regression in the mozilla-central builds ;

I do a mozregression test, all result are in the bug : https://bugzilla.mozilla.org/show_bug.cgi?id=1266791

Thanks for the answers

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hi patclash, it looks that due to other issues support for processors without sse2 support will be dropped starting with firefox 49. there is a switch to vs2015 for compiling firefox and apparently it has some bugs that cause instability with older processors.