minor feature: Block D3D11 when using Intel drivers on Windows 7 systems with partial AVX support ( ), Users of 32-bit Firefox on 64-bit Windows are migrated to 64-bit Firefox for increased stability and security. Reference link to 56.0 release notes, Due to a in Mac OS X High Sierra, fullscreen mode has some, Startup crash with RelevantKnowledge adware installed. Firefox Support has helpful instructions to remove it. Users running Firefox for Windows over a Remote Desktop Connection (RDP) may find that audio playback is disabled due to increased security restrictions. Learn how to mitigate this until it is corrected in an upcoming release, Startup crashes with 64-bit Firefox on Windows 7, for users of Lenovo's "OneKey Theater" software for IdeaPad laptops. To this crash, please re-install 32-bit Firefox.