Firefox 142.0.1 (aarch64) sync prompt is wrong and risks wiping wrong device with data
Desktop browser: no Bookmarks Phone browser: Bookmarks Goal: Sync phone browser Bookmarks to desktop browser Bookmarks. Danger: backup Bookmarks before Sync syncs wrong way and no data wipes data device.
Desktop browser sync prompt is wrong: Menu -> tap Sync and save data -> tap Ready to Scan -> scan desktop Firefox QR code -> Pairing unsuccessful. Try again. OK
Here's the correct steps: Sync your Firefox experience -> tap I already have Firefox for mobile -> tap Continue -> Sync Firefox on your phone or tablet -> open Firefox 144.1 (62735) on phone -> tap Menu (3 dots at bottom) -> tap Settings -> tap Sync Now -> desktop Firefox -> open new Tab -> Bookmarks appear -> right click Import bookmarks from another browser to Firefox -> tap Remove from Toolbar.
See also: https://support.mozilla.org/en-US/questions/1552007