HTTPS-E: A promise chain failed to handle a rejection.
Along with #12231 (moved) I got this entry in the console.
It was just one instance.
A promise chain failed to handle a rejection. Date: Sun Jun 08 2014 09:52:15 GMT+0200 Full Message: Full Stack: JS frame :: re[/gre/components/nsLivemarkService.js](/gre/components/nsLivemarkService.js) :: LS_getLivemark/< :: line 405 native frame :: <unknown filename> :: <TOP_LEVEL> :: line 0
the line contains:
Add-on Version: 3.5.1 Firefox Version: 29.0.1 (German) OS: Win 7 SP1 (64bit German)
I'm unable to reproduce it, as said above it was just for one instance. (... don't make promises...)