From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:0.9.8+) Gecko/20020212 BuildID: 2002021203 I press F9 to remove the sidebar. Result: Sidebar "space" still there. Restart doesn't help. Occurs in Modern and Classic Theme. Same result using View --> Sidebar. Reproducible: Always Steps to Reproduce: 1. Press F9 to remove the sidebar. 2. 3. Actual Results: Sidebar space still there. Expected Results: Sidebar should completely vanish.
Duplicate of "superfluous horizontal grippy and clicking "X" doesn't close/hide/remove/switch off sidebar" *** This bug has been marked as a duplicate of 124620 ***