steps for reproduct: 1. sign in mac A's firefox, version might be 105 2. sign in iphone's firefox, version is 105 also, and then sync through camera scan. 3. sign in another mac B's firefox, i can't figure out the exactly version, and then i can't use the tool "send to my devices" to send page to my iphone anymore. (i can use the tool, but the device options of my iphone disappeared) And then , i try to config my account, like remove account no longer use, but not archive the goal of sync between A's firefox with my iphone's firefox. so what's wrong with operate, and i'm pleasure to provide my sync-log if helps. and i also want to ask what's the inner logic of firefox's sync? why there fill with amount of bugs with the sync which is the basic functions for a broswer? Thanks