thx for your prompt answer
1. it is actually FF 52.0.1 (and HS2 4.0.4) >running on Linux: KDE-Neon (Ubuntu 16.04.)
2. here the output of the browser console (what's that chrome stuff?):
Code: Select all
RangeError: invalid language tag: chrome://global/locale/intl.properties HistorySubmenus2.jsm:46:19
CanonicalizeLocaleList self-hosted:1536:17
InitializeDateTimeFormat self-hosted:2231:28
this.HistorySubmenus2.formatDate chrome://historysubmenus2/content/HistorySubmenus2.jsm:46:19
HM_rebuildPopup chrome://historysubmenus2/content/HistorySubmenus2.jsm:298:38
PVB__onPopupShowing chrome://browser/content/places/browserPlacesViews.js:924:9
HM__onPopupShowing chrome://browser/content/browser-places.js:806:5
PlacesMenu chrome://browser/content/places/browserPlacesViews.js:1785:3
HistoryMenu chrome://browser/content/browser-places.js:704:3
onpopupshowing chrome://browser/content/browser.xul:1:78
Code: Select all
PM_handleEvent chrome://browser/content/places/browserPlacesViews.js:1816:9