User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:51.0) Gecko/20100101 Firefox/51.0 Build ID: 20170125094131 Steps to reproduce: 1. Create a new bookmark on some page 2. Modify the location field by appending the string "%s" so that a parameter can be passed to the bookmark 3. Add the string "#" as a keyword for the bookmark 4. Try using the bookmark with a string such as "# JIRA-123" Actual results: The default search engine is used to search for "# JIRA-123" Expected results: The bookmark should have been used to look up the bookmark previously created and by appending "JIRA-123" at the end of the location field.

Please note that this is a regression. This bookmark creation procedure used to work in previous Firefox versions.