How does the browser ask to open a particular application like this? Did it know this application is installed on my computer? enter image description here
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[this](https://stackoverflow.com/q/3152482/15781079) may answer your question – MrMythical Oct 18 '21 at 03:05
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the browser does not know whether or not you have the application that is shown, the browser is programmed, in case a protocol url (such as "steam://", "roblox://" among others) is opened, it does it with this box is shown, when an app is installed, for example, Roblox, when you install it, it installs together, a URL Protocol, which serves to run the program.
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