Games Fail to Load in Firefox Private Browsing Modes

[rameshvarun]

Love.js games fail to load in the following situations:

• Firefox Private Browsing
• Chrome Incognito when Embedded in an Iframe (for example, when uploading to Itch.io)
• Brave browser when embedded in an iframe

This can be easily repro'd by:

• Opening https://davidobot.net/lovejs/lovejs_spec_c/ in Firefox private browsing
• Opening https://jsfiddle.net/8rz41ms0/ in Chrome Incognito mode
• Opening https://jsfiddle.net/8rz41ms0/ in the Brave web browser

The culprit is IndexedDB. In private browsing mode, some browsers will throw exceptions when performing IndexedDB operations. The fix is to catch these exceptions in EmscriptenPersistence.js and ignore; so games can proceed using MemFS.

[MikuAuahDark]

Unfortunately Firefox does not support IndexedDB in private browsing, which love.js requires. Please complain to Mozilla.

https://bugzilla.mozilla.org/show_bug.cgi?id=1639542