@hexaheximal@esm@hexaheximal ...and even if we think local #WebApps are a legitimate way to handle sensitive comms - they ain't but let's just assume they are for the sake of argument - WHY would you do anything beyond a .desktop file that includes startup parameters for #Firefox (or even #Chrome if you're that kind of Cyber-Masochist!) that specify the browser, and the file to load.
Because any good #WebApp should be reduceable as #HTML5 + #JS6 + #CSS3 and measured in kB or maybe a few MB.