User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0 Build ID: 20170323105023 Steps to reproduce: Two Windows computers, PC and laptop. PC has two Windows accounts each with its own Firefox profile (A & B). Wish to sync Add-ons and Bookmarks between laptop and PC account A, but only Add-ons between PC account B and account A/laptop. Actual results: If I set sync option in account A to sync Bookmarks (as required), when I "sync now" in account B Bookmark syncing gets turned on. If I turn Bookmark syncing off in account B (as required), then log on to account A and sync that, Bookmark syncing gets turned off. In other words, I cannot have different Bookmark sync options for accounts/profiles A and B. Expected results: I should be able to set account B to sync only Add-ons and account A to sync Add-ons and Bookmarks since they have their own profiles. I am not syncing Preferences.

Thanks for the report - we are tracking this in bug 1215415