Hi. I want to learn how to develope firefox add-ons. So, i wanted to inspect example add-ons. I downloaded example repos from https://github.com/mdn/webextensions-examples . I choosed “borderify” add-on. As you know, it has manifest.json and js file. I packaged it “zip” file with 7-zip. (used store comparassion method)and renamed it, zip to xpi.
After that, i can install it on about:debugging without problem. But when i try install from extension menu, “Install add-on from a file”, it warns me with this message: “this add-on could not be installed because it appears to be corrupt”
Where am i doing wrong?