Ok. Update. 1. I compiled a new darwine with 1.1.16 2. I used a completely new .wine envorinment. 3. I installed Firefox3 4. uncheck for "check everytime if i am the default" and tell firefox thats the default browser. Result: Yes, its the default browser Now my next Problem: The Application is use is written in an older Delphi-Version and use navigate(url) to tell the default browser to open a html file and show it in the applications window. i didnt get any information in this windows. the windows is white and empty. If i open the test-html file directly with firefox i can see infos. (the djvu plugin shows me a page corerctly). I have following log in wine: fixme:bitblt:X11DRV_ClientSideDIBCopy potential optimization: pixel format conversion fixme:shdocvw:PersistStreamInit_Load (0x14d8c0)->(0x1fb210) fixme:shdocvw:navigate_url Unsupported args (Flags 0x689414:10; TargetFrameName 0x689414:10) trace:loaddll:load_builtin_dll Loaded L"C:\\windows\\system32\\urlmon.dll" at 0x62bf0000: builtin fixme:urlmon:URLMonikerImpl_BindToObject use running object table fixme:shdocvw:BindStatusCallback_OnProgress status code 11 fixme:shdocvw:BindStatusCallback_OnProgress status code 14 fixme:urlmon:create_object Could not find object for MIME L"FirefoxHTML" fixme:shdocvw:PersistStreamInit_Load (0x1e04c8)->(0x1fb210) fixme:shdocvw:navigate_url Unsupported args (Flags 0x689414:10; TargetFrameName 0x689414:10) fixme:urlmon:URLMonikerImpl_BindToObject use running object table fixme:shdocvw:BindStatusCallback_OnProgress status code 11 fixme:shdocvw:BindStatusCallback_OnProgress status code 14 fixme:urlmon:create_object Could not find object for MIME L"FirefoxHTML" Can someone give me some hints where to search? As far as i can see there are problems calling the outside brwoser and getting information back? regards Joerg