I am having problems taking youtube video screenshots at the best resolution and using add-ons. I would like to take screenshots of youtube videos. I have in the past been able to take them by right-clicking on the youtube video (twice) and selecting 'Save Snapshot as...' this works but for some reason it saves at different resolutions. Some save as 1080p and others at 720p...I haven't been able to find a setting so that it always saves at the 1080p setting... Then I thought I would try a addon that saves a youtube screen shot which I did and on the about:addons page it shows as enabled...but for the life of me I cannot see how to actually use it...no matter where I click I cannot find the icon to click on...the only suggestion I can see in firefox help is how to open the about:addons page which just takes me back to showing that it's enabled... Please, I would like some help...all I would really like to do is to take single screen shots of youtube vides in as high as resolution as possible...