Web Browser Enhancement
Tidy Sidebar development stopped.
useful if you want to manage menu without closing them !
Unfortunately The add-on will not receive any more updates and will stop working by next November with Firefox 57, when XUL-based add-ons will be deprecated in favor of the WebExtensions API.
change the new tab page to whatever web accesible URL you like
it's cool. Tabs Outliner
ok will check it later