Created attachment 8696309 [details] 2015-12-06_00-39-59.mp4 User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:42.0) Gecko/20100101 Firefox/42.0 Build ID: 20151029151421 Steps to reproduce: Set a keyword of any bookmark to any word e.g. "testbug1". Then set the keyword for something else, e.g. "testbug2". Then set the keyword back to the first word, "testbug1". Actual results: The bookmark does not save "testbug1" as the keyword, it stays on the previous keyword "testbug2" Expected results: It should have switched to the latest keyword "testbug1", since it's not in use by anything anymore.