Thanks to a post on Lifehacker, I found out about the It’s All Text Firefox plugin that lets you edit any text area in your favorite editor.
From the comments on the plugin page, some Mac users have had issues with getting it to find their editing applications, and it is still in beta, so your YMMV.
What I did as a workaround was point the plugin at the /usr/bin/open utility. This will open the field’s content in a document in whatever app you have as your default text-file opener — as man open says,
The open command opens a file (or a directory or URL), just as if you had double-clicked the file’s icon. If no application name is specified, the default application as determined via LaunchServices is used to open the specified files.
Hopefully they will get this working properly soon.


I just downloaded the plugin and I'm composing this in TextMate
The trick is to point at the binary and not the application folder.
For example. TextMate.app is just a folder. You need to point to
the executable at this location.
/Applications/TextMate.app/Contents/SharedSupport/Support/bin
To do this, you need to get past the application's folder.
When you are setting the preferences, you need hit the
key sequence of Command-Shift-G to target the binary within
the Application's folder.
Great plugin!
/Applications/TextMate.app/Contents/SharedSupport/Support/bin/mate is what worked for me
Thank you three for posting here. Your ideas were just enough of a nudge in the right direction. In case anyone is interested, the Komodo Edit binary is:
/Applications/Komodo Edit.app/Contents/MacOS/komodo