Be careful with old versions!
These versions are displayed for reference and testing purposes. You should always use the latest version of an add-on.
I needed to recompile to make the DDL compatible with Firefox 5.0
All platforms supported in previous versions are not recompiled for FF4.0. Simply, due that I do not have all platforms :-)
See project home page for a full list and please help if you want.
The new version recognizes HTML5 format.
The validation of HTML5 is done only in the Page Source and online (ie with validator.w3.org).
Please report any issue to firstname.lastname@example.org.