Is it possible for a .net application to check which browser someone is using, and if it's firefox to check if a certain plugin is installed and/or running?
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Is it possible for a .net application to check which browser someone is using, and if it's firefox to check if a certain plugin is installed and/or running?
The location of the user's default browser is stored in the registry under HKCR/HTTP/shell/open/command.
Checking for presence of a Firefox extension is a little difficult if the user has multiple profiles. But you can try looking through the folder Documents and Settings/username/Application Data/Mozilla/Firefox/Profiles/profilename/extensions.