The stands as a monument to one of the most chaotic periods in desktop UI history. It was a valiant effort by Mozilla to keep pace with Microsoft’s forced evolution – but user indifference and Microsoft’s own pivots rendered it obsolete before launch.
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In the turbulent era of Windows 8, Microsoft bet everything on a radical new interface design language – “Metro” (later renamed Modern UI). This tile-based, touch-first environment ran alongside the traditional desktop. To survive in this new ecosystem, browsers had to adapt. The stands as a monument to one of
Microsoft offered a solution: a new API environment called "WinRT" (Windows Runtime). This allowed developers to build apps that lived natively within the Metro interface. Mozilla, always keen on providing open-source alternatives, launched Project "Electrolysis" (e10s) and eventually birthed the Firefox Metro Preview. Use these trusted archival sources: In the turbulent
Given these issues, many users report that only works in a VM, and even then, you cannot log into Firefox Sync or load modern HTTPS sites (expired root certificates).