Flag storage that is not available under private mode

[jimmywarting]

When the user is running in private mode then it can be tricky to choose the right storage tool to use.

For example

• In IE10+ & edge you don't have the global indexedDB context
• In Firefox you can't use indexedDB bugzilla #781982
• In Blink you can't use either persistent or temporary filesystem
• In Safari you can't use any client side storage except for cookie

I think it would be useful to mention this under Notes. in most cases you can use localStorage except from safari

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[Schweinepriester]

+1

[Ugoku]

+1

[Juburin]

+1

[indolering]

Importing from #2944:

IndexedDB is available in private/incognito mode in both Chrome and (soon) Firefox. I would like to indicate the lack of support in older versions as well as Edge and Safari.

I personally would prefer to switch everything to partial support along with a note tag. Is this the preferred way to go or should I just add a note tag? I'm also worried about adding a note tag to virtually every browser/version combo....

[indolering]

@jimmywarting I think this needs to be broken into tickets for each storage type.

[indolering]

Move IndexedDB to #3004?

[indolering]

For localStorage, I think you are basically proposing moving many of the "known issues" to a flag....