mimeapps.list

[Default Applications]
application/javascript=nvim.desktop;
application/pdf=org.pwmt.zathura.desktop;
image/gif=imv.desktop;
image/jpeg=imv.desktop;
image/png=imv.desktop;
text/css=nvim.desktop;
text/html=browser.desktop
text/plain=nvim.desktop;
video/mp4=mpv.desktop;
x-scheme-handler/about=browser.desktop
x-scheme-handler/http=browser.desktop
x-scheme-handler/https=browser.desktop
x-scheme-handler/unknown=nvim.desktop