> They made ONE switch to a superior and standard extension model No, they made TWO. The original model was the XUL-based one. Then there was the Add-on SDK:

> They made ONE switch to a superior and standard extension model No, they made TWO. The original model was the XUL-based one. Then there was the Add-on SDK: https://developer.mozilla.org/en-US/docs/Archive/Add-ons/Add-on_SDK https://developer.mozilla.org/en-US/docs/Archive/Add-ons/Add... THEN WebExtensions. So some extensions had to be ported twice, within just a couple of years. This alienated a LOT of add-on developers.