Buku is a FOSS, command-line bookmark manager for GNU/Linux.
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Advanced bookmark management is possible, with the right use of Buku's commands.
Pro Easy to use
Using Buku is easy once you memorize its simple syntax.
Pro Fully compatible with firefox bookmarks
Pro Quality doccumentation
Con CLI only
Buku's interface is intuitive, but that won't stop the lack of a GUI from worrying someone who's uncomfortable around the command line.