Dropbox does not officially support Xubuntu's file manager Thunar. Crunchbang maintains a Thunar Dropbox package that restores alot of the official plugin features. With it you'll get options to browse the file on the Dropbox website, get shareable link and view previous revisions. Terminal commands are highlighted in blue.
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Download and install the 64 bit client
cd ~ && wget -O - "https://www.dropbox.com/download?plat=lnx.x86_64" | tar xzf -
Download the 64 bit plugin
Install the plugin
sudo dpkg -i thunar-dropbox-plugin_0.2.0-1_amd64.deb
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