Be careful with old versions!
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* Drop support for SeaMonkey 2.16 and older.
* Add support for per-window peivate browsing changes in Firefox 20.
* Add support for X-Archive-Orig-Last-Modified (used on archive.org).
* Move to S4E build system. Support install.rdf localization.
* Added locales ja-JP
* Updated translations for: de, fr, pt-BR, sr, sv-SE, zh-CN