That was easy.
I was recently asked about the possibility of adapting the Remember Mismatched Domains extension to support Thunderbird. Well, it turned out to be a snap. All I had to do was add Thunderbird as a target application in the extension’s install manifest. How cool is that?
What is Remember Mismatched Domains?
The Remember Mismatched Domains extension for Firefox and Thunderbird adds a â€œDonâ€™t warn me again about this certificate for this domainâ€™ checkbox to the Domain Mismatch warning window. When selected the domain name and security certificate domain pair is stored in a Firefox / Thunderbird preference and the security error dialogue will be bypassed on subsequent visits.
(I explained why I wrote the extension in the original announcement).
How do I install the extension?
If you want to install the extension in Thunderbird, you have to follow these steps:
1. In your default browser, right-click on the download link. Choose the “Save link to disk…” option and download the XPI install file into a directory of your choosing.
2. Open Mozilla Thunderbird and open the ‘Extensions’ dialog by going to the ‘Tools’ -> ‘Extensions’ menu.
3. On the Extension dialog, there’s a button named ‘Install’ in the lower left corner. Click on it and browse to the directory where you saved the remember-mismatch.xpi.
4. Choose the file you downloaded earlier on and click ‘OK’.
Firefox users left click on the link.
Itâ€™s a beta and could use some testing in different environments. The comments section would be a good place to let me know of any issues.
Update (Oct. 08, 2005): version 0.6 supports both Thundebird 1.5 Beta 2 and Firefox Beta 2.
Update (Oct. 25, 2005): version 0.7 fixes an issue where certificates with names containing space characters were not being properly “remembered”. My apologies to Emmanuel’s dad for the delay ;-)