Windows 10 will reach EOS (end of support) on October 14, 2025. For more information, see this article.

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What Firefox version should I install on Win7 (32-bit) system which does NOT support SSE2?

OldSysFirefox
OldSysFirefox
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Upgrades to current Firefox version won't install because of processor inadequacy. Firefox version which DID work has been corrupted by upgrade process and no longer does. Need to reinstall an older Firefox version which will work ... and is the most up-to-date ... for a processor which does not support SSE2. Thanks!

Upgrades to current Firefox version won't install because of processor inadequacy. Firefox version which DID work has been corrupted by upgrade process and no longer does. Need to reinstall an older Firefox version which will work ... and is the most up-to-date ... for a processor which does not support SSE2. Thanks!

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jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
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Is it the problem described in this article: Your hardware is no longer supported?

The "Extended Support Release" version of Firefox 45 can be downloaded from the following page (scroll down to your preferred language):

https://www.mozilla.org/firefox/organizations/all/

I assume you have been using a regular 32-bit version and not the more limited 64-bit version. On the download page, that's the one for "Windows" and NOT "Windows 64-bit".