Firefox 4 excellent and very fast browser, but many add-ons stopped working. One of them is delicious add-on. Of course is possible to use delicious bookmarklets, but it certainly can not replace all functionality that old delicious add-on has. With the help of a small change in one of the files – it will be possible to return the add-on back to the “life”.
First thing to do, in the windows explorer enter the following path:
Choose a folder that name ends with .default extension.Then go to extensions folder.
In the folder locate a directory with following GUID (represents delicious add-on)
Under GUID directory open install.rdf file in any text editor.
Find a line contains em:maxVersion attribute .
Change attribute value to “4.0”.Save the file . Restart Firefox 4 .
Final file shown below