Comment by myonceinalifetime: Thx for the suggestions tamplinjohn.
I've tried JDK 1.60_07, 1.60_13, 1.60_14, 1.60_16 to no avail. Launching the OOPHM server does not launch firefox, nor create a new tab nor create a new session in an existing tab. Like I said navigating to the given server URL runs the gwt app 100% perfectly fine, as if it was compiled to JS. The breakpoints are definitely set on the class files being ran, they are hit when I turn OOPHM off and use the normal gwt browser. I have tried the prebuilt oophm xpi extension found in oophm\plugins\firefox\prebuilt and I've tried a couple found in trunk\plugins\xpcom\prebuilt\, both the ff3 and ff3+ ones. Nothing invokes the breakpoints. I've made sure to do clean builds. I might just have to go back to time old method of using window alerts to debug my app :( For more information: http://code.google.com/p/google-web-toolkit/wiki/UsingOOPHM --~--~---------~--~----~------------~-------~--~----~ http://groups.google.com/group/Google-Web-Toolkit-Contributors -~----------~----~----~----~------~----~------~--~---