A very short post ...
For a while my Firefox has been showing a blinking caret on all pages, even on pop-ups. Turns out I must have inadvertently hit 'f7' at some point which turns on a traditional text editor style caret for text selection (i.e one you can see).
There's nothing obvious in the options to disable this. But pressing 'f7' again sorts it out. I wouldn't have thought to search for 'caret' in the options(!)
