Rated 5 out of 5 stars

It works on Firefox 3.0.11.
If it was not installed, try the next...

1.Extract an install.rdf and a chrome folder from resizeable_textarea-0.1d-fx.xpi.

2.Open install.rdf by the text editor.

3.Change the number of the version in the next part.

exp.
2.0.0.*

3.5