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2 Pane Bookmarks
Provides separated "Bookmarks" Sidebar panel like Opera....
Firefox extension Bookmarks 2 Pane Bookmarks separated Sidebar pane
Separe
Separe is a Firefox extension which helps you keeping tabs tidy by introducing a new kind of tab!...
Firefox extension Firefox separated tidy tabs separated tabs
Text::FixedLengthMultiline
Parse text data formatted in space separated columns optionnaly on multiple lines...