Rated 5 out of 5 stars

by Johny on Dec. 19, 2009 · permalink

UPGRADE SOLUTION

Step-by-step procedure:

Download the xpi file and extract it (with winzip/7zip/powerarchiver/winrar etc).

Go in the extracted folder and edit (with plain-text editor - such as notepad) the file install.rdf

For Firefox compatibility, go to line 12 (em:maxVersion) and change the value to
3.0.*

For Thunderbird compatibility, go to line 19 (em:maxVersion) and change the value to
3.0.*

I suggest you change both.

Save the file and compress the folder in a zip file (i.e. british_english_dictionary.zip). Rename the zip file to an xpi file (i.e. british_english_dictionary.xpi).

Install the new XPI addon into Firefox and/or Thunderbird!