Ubuntu
firefox package

  1. Bug #1697800
  2. Comment #1

Comment 1 for bug 1697800

Revision history for this message
Simon Déziel (sdeziel) wrote :

Looks like it would be intentional according to https://www.mozilla.org/en-US/firefox/53.0/releasenotes/ :

"Ended Firefox Linux support for processors older than Pentium 4 and AMD Opteron"

Also, for Windows, they require SSE2 since Firefox 49.