First, collect platform information and version number of Firefox and Echofon.
Second, set Echofon preferences. Enter
about:config in Firefox location bar then enter "twitter" in the filter field. You can see several preference variables of Echofon. Set "extensions.twitternotifier.debug" to "true" to enable debug logging.
Next, open Tools > Web Developer -> Error Console. You should see several debug logs for Echofon.
The error console looks like this:
The error console contains all errors and warnings. You may have quite a few. The most efficient way of debugging Echofon is: