Hi, I extracted my copy of firefox-58.0b12.tar.bz2 under my home in Centos 7. Launched, synched my account. Closed the browser, re-opened, took some secs to auto-update and then got this "Error interpreting XML: entity not defined" error in a wthite window on startup: Errore interpretazione XML: entità non definita Indirizzo: chrome://browser/content/browser.xul Riga numero 243, colonna 5: <broadcaster id="viewTabsSidebar" autoCheck="false" sidebartitle="&syncedTabs.sidebar.label;" ----^ If I run ./firefox/firefox on console I get this 2 line 13 times: (firefox:4731): GLib-GObject-CRITICAL **: g_object_ref: assertion 'object->ref_count > 0' failed (firefox:4731): GLib-GObject-CRITICAL **: g_object_unref: assertion 'object->ref_count > 0' failed I checked the firefox/updates/0/update.log and all looks ok I deleted my firefox folder, extracted again, the same error appears...