I started a new profile because of old bugs. When I tried to re-add the session-saver addon, mozilla pops an assert and aborts. Document https://addons.mozilla.org/extensions/moreinfo.php?id=436 loaded successfully WARNING: default.xpm not found: file nsWindow.cpp, line 3520 ++WEBSHELL 0x1816a50 == 19 ++DOMWINDOW == 42 ++DOMWINDOW == 43 --WEBSHELL 0x1816a50 == 18 WARNING: default.xpm not found: file nsWindow.cpp, line 3520 ++WEBSHELL 0x20cc1f0 == 19 ++DOMWINDOW == 44 ++DOMWINDOW == 45 Assertion failure: !OBJ_GET_PARENT(cx, obj), at jscntxt.c:882 /usr/local/lib/seamonkey-1.5a/run-mozilla.sh: line 131: 21527 Aborted "$prog" ${1+"$@"} The XPI downloader fetches the XPI after you click [Install], when the download is finished, the assertion is popped and mozilla aborts.

*** This bug has been marked as a duplicate of 336695 ***