Comment 416 for bug 195698

Multiple master password prompts can be triggered in a variety of ways. Bug 475053 will fix many of them, by serializing HTTP auth and proxy auth prompts. The main remaining cause will be from opening multiple tabs with logins available (perhaps at startup), each of which triggers a master password prompt.

Login manager may need to serialize the filling of forms in a similar way, so that multiple master password prompts are not invoked. Alternately, we may (instead? also?) want to look at involving PSM in the fix, so that opening 1 tab with form auth and 1 tab with HTTP auth don't each invoke a master password prompt.

[I'm filing a new bug on this, since the tangle of existing bugs is an unhelpful mess.]