Supported Browsers: Latest 3 versions of Chrome and Firefox. Latest version of Firefox mobile'and Chrome mobile. Requires internet for loading.
Works on all Linux distributions supporting AppImages.
Chrome: Open the web version. You will get an install banner asking you to add it, but if you denied that, you can just click the top right menu in chrome, and click "add to homescreen".
Open the web version. Firefox will show a home icon in the URL bar, which you just need to click to install.
Chrome: Open the web version. Open the hamburger menu, click "More tools", click "Add to desktop ...".
Opera: Open the web version. Open the developer tools (Ctrl.+Shift+I), click on "Application", select "Manifest", click "Add to homescreen"