With FB you have a single point of failure: "Hey Jerry block api_key." That is one field updated in one table. For Firefox to block your website/web app they m

With FB you have a single point of failure: "Hey Jerry block api_key." That is one field updated in one table. For Firefox to block your website/web app they may have to force an update on the millions of browsers out there, which is not equally easy. If your hosting company shuts you down, you move to another (hopefully you had backups). If Google stops supporting Angular maybe you move to React. If Apple removes you from the appstore and people really want your app, maybe they may find ways to download. If Instagram says "no more access to our users from your app," well your app just became useless if it depended solely on Insta.