They are 2 different discussions, one about extensions and the other about bookmarks bar. The problems may be both Safari-Mac related, but when I post I don't have a clue whether that's true or not. Since you can't change the title of the thread, you'll have to put up with me talking about Safari and it's different problems as they relate to me. I'm sorry if that doesn't meet the decorum of these Apple support groups, in particular the Mac Safari support group.
You mentioned both bookmarks and extensions in your orginal post on this thread > https://discussions.apple.com/message/17872836#17872836
The problem is when you start multiple threads for the same issues, we have to go back and check each thread to see what troubleshooting that's been tried that hasn't worked for you. That is time consuming not just for us but for you as well.
In case you aren't aware, we are volunteerrs. This is a user to user forum. You are not addressing Apple employees here.