safari displaying strange "window resize" bar
Hello,
Since yesterday my browser (Safari 8.0.8) has been displaying a strange bar, below the bookmarks bar and above the tabs bar. It reads "Options: this bar is necessary for resizing windows. It should not be seen, used, or played with." See attached.
- Is this the symptom of an actual problem (as in my browser being compromised) ?
- How can i make it disappear ?
Thank you.
MacBook Pro (Retina, Mid 2012), OS X Yosemite (10.10.5)