v3.1.7 will not work on FF 52.9.0 ESR (last non multi process version). No mouse button will activate the selecting rectangle and any changes to options revert to default settings.
v3.1.6 will give me a rectangle, but it won't scroll down the page when I drag the mouse below the screen.
v3.1.5 will, like 3.1.6, let me select links, and will scroll when I drag the mouse below the screen, but it won't scroll when I use the down arrow or the mouse wheel.
This has been my favorite extension for a long time. While I'm sure that it most likely plays nicely with multi-process FF, is there any way you could get a working version for those of us who can't upgrade? v3.1.5 with the ability to scroll down the page with the down arrow would be immensely invaluable. Thanks.