Could you please explain to me how I get this add on to work with the new Firefox?

I have added the add-on but pressing the Always on Top button only opens a window containing this message:
You have to download native AOT application before using this extension (new mozilla policy)
Please download three files from here(github repository) and run install.bat

So I went and dowloaded all 3 files there
aot.exe.html
aot_manifest.json
install.bat.html

Neither launching the aot.exe not the install.bat does any good - could you please explain to me how the installation is done? If I run the install.bat I only get redirected to a github page.