Firefox page style switching -

[Bob Goodwin]

Before I replaced F-8 with F-9 I had an item on the Firefox toolbar to 
change the page style.  It was very convenient, when I ran into a page 
that displayed poorly I could click on that item and reduce the page to 
almost a text display.  I lost that feature and have not been able to 
restore it.

I can use View > Page Style > No Style but that's a lot of mouse clicks 
compared to what I had before.

Is anyone familiar with this and how can I restore it?

Bob Goodwin