Compare versions of your Dropbox files in-browser or with your configured diff tool. Trigger from any "Version history" page.
Current Version Release Notes:
2017-01-26 update (version 126.96.36.199) - Implement "Ignore exit status" option.
2017-01-22 update (versions 188.8.131.52-19) - Updated installation instructions for Mac/Linux; bug fixes.
2017-01-21 update (version 184.108.40.206) - Support "Load older versions".
Provides two options for comparing different versions of your Dropbox files: 1) an external diff tool, or 2) a side-by-side diff within your browser. This can be TortoiseMerge, KDiff3, FileMerge, or any tool which can be triggered from the command line.
From www.dropbox.com, in the "Version history" of any file, a column is added which allows you to select two versions to compare. Click the "Diff" button to trigger your configured diff tool, or the "Inline" button to view the difference in-browser.
Supports Windows, Mac, and Linux as far as I know, though I can't be sure every possible configuration is covered.
Please let me know if you run into any issues at http://blog.vicshih.com/2011/09/dropboxdiff-chrome-extension.html .
2017-01-18 update (version 220.127.116.11) - External diff restored; requires a separate "DropboxDiff Helper" installation.
2017-01-05 update (version 18.104.22.168) - Inline diff restored; external diff support coming soon. Removed NPAPI requirement, since it is no longer supported.
2014-01-05 update (version 22.214.171.124) - Inline diff implemented.
2014-01-04 update (version 126.96.36.199) - Account for "sjid" parameter in any position. Distinguish Diff button better.
2013-06-23 update (version 188.8.131.52) - Switch from background page to event page.
2013-01-05 update (version 184.108.40.206) - Fixed to support 64-bit linux. Added a Test button to the options page.
2012-11-05 update (version 220.127.116.11) - Fix for Mac - upgraded to FireBreath 1.7 (774c948f5e).
2012-08-31 update (version 18.104.22.168) - Better content security policy settings, upgrade to jQuery 1.8.0.
2012-08-31 update (version 22.214.171.124) - Update to manifest version 2.
2012-06-24 update (version 126.96.36.199) - Handle site change (table header removed).
2011-09-12 update (version 188.8.131.52) - Added extension description. Added example cygwin command line for Windows.