Great extension! Thanks a lot to the author. Anything coming up for TB17? Unfortunately, I stopped using ComposeRTF since TB upgraded me to v. 17, which Mozilla reports as incompatible with this great extension.
Thanks LouvaAhmar for the instructions. The extension now works normally in Thunderbird 6. I don't know why they don't make the ability to change writing direction built in. There are many users who needs this ability.
For use on 3.x: 1) rename "composertf-1.0-tb.xpi" to "composertf-1.0-tb.zip" 2) unpack file "install.rdf" from this archive 3) Open it in notepad, find string "<em:maxVersion>2.0.0.*</em:maxVersion>" and change to "<em:maxVersion>4.0.0.*</em:maxVersion>". 4) save this file. 5) add it to arhive "composertf-1.0-tb.zip" (replacing original). 6) rename back "composertf-1.0-tb.zip" to "composertf-1.0-tb.xpi". 7) instal it. (it must work)