Is there a way for using a batch file to find the default browser on my computer?
If you're looking for a Windows .bat solution, this should work on Windows 2000 and later:
reg QUERY HKEY_CLASSES_ROOT\htmlfile\shell\open\command /ve
Result (on my Windows machine)
HKEY_CLASSES_ROOT\htmlfile\shell\open\command (Default) REG_SZ "C:\Program Files (x86)\Internet Explorer\iexplore.exe" -nohome
See the REG.EXE help for more information:
REG /?