Changing default application is so easy in Arch-based Linux.

Maybe work for other distros.

Just open this file with your text editor:

~/.local/share/applications/mimeapps.list

Add your mime type and default application. For example, for URLs you can use these lines:

[Default Applications]

x-scheme-handler/http=google-chrome.desktop
x-scheme-handler/https=google-chrome.desktop

Finding mime-type

Finding any file’s mime type is easy.

If you use linux, you can use file command:

$ file –mime-type data.json
data.json: application/json

$ file –mime-type w1.png
w1.png: image/png

or you can use -i switch:

 $ file -i w1.png
 w1.png: image/png; charset=binary

Also you can use online applications. For example https://mimetype.io/.

search file extension in the top menu search box or upload your file:

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