Puntuado con 5 de 5 estrellas

Seems broken, all of a sudden - subsequent to an update from Firefox 29 [PaleMoon] to Firefox 34.0.5 [Firefox proper]. History entry in the contextual menu no longer present; when checking the 'options' button in the add-ons view, the following error occurs:

XML Parsing Error: undefined entity
Location: chrome://contexthistory/content/options.xul
Line Number 155, Column 13:

It would be useful if this behavior can be confirmed.
Hopefully, the developer is listening...

XP, Firefox 34.0.5