New add On bar after update

[Gazdok]

Firefox updated this morning to v46 and restarted. Afterwards I had another toolbar at the bottom of the page I did not have before and also that I cannot remember ever installing. It hasa close icon on the left and a menu icon next to it, but they are not functioning, i.e. I cannot close the bar or open up a menu. on the right it has a bin which has a speech bubble saying "clear all".
Does anyone know where this bar has come from and how to get rid of it?

 

[Callender]

Thats the addon bar. You must have installed an addon that uses it at some point.

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You can probably close it from the "Menu Bar"

If you don't see the Menu Bar - right click on a blank area at the top of the screen and enable the Menu Bar checkbox.

As for which add on you've got there - I don't know. However if you type:

about:support

into the address bar you should be able to see a list of all installed addons (scroll down on the screen that opens)

You could aslo select "Copy to clipboard" and paste the results here for others to inspect.

 

[Callender]

From Menu Bar it's:

View> Toolbars> Addon Bar