If I remember correctly, yes. There was a pain in the ass a few years ago when Firefox switched from their own add-on system to one that matched Chrome’s, despite Firefox’s being more powerful and mature. The goal was to make it easier to port Chromes (arguably) greater variety of add-ons to Firefox.
It was an unpopular decision and it was the start of a downward decline for Firefox. People that had their browser “just the way I like it” found themselves starting fresh essentially, and without some of their favourite add-ons.