stantdardize updateTitlebar
fix iter 'attributes'

NamedNodeMap is remaed to MozNamedAttrMap since Fx22.
see: https://bugzilla.mozilla.org/show_bug.cgi?id=847195
fix: broken nmap c when "set noinsertmode"
fix: support any contet editable element
fix bug: tabattach does'nt work correct.

Fixes issue 877
Update issue 877
Good catch. Thank you very much.
supports Fx25's findbar. Fixes issue 879.

Note:
When minVersion > 24, should remove legacy codes.
Bug 847: tabcount in status line wrong when using several tab groups.

The total count shown in the status line is the total number of tabs in
the session (not only in the current tab group); and the current tab
index would be the index in that full tab list.

Fixes issue 847
Fix TypeError exception when scrolling while the buffer is being loaded

  Fixes issue 866
fixed typo in common/content/tabs.js

line 428, borwser -> browser
Fixes issue 896