The Grab And Drag extension provides a number of alternative ways to scroll pages in Firefox, Thunderbird, and Flock. It provides Adobe Acrobat-style grab and drag page scrolling and scrollbar-style scrolling initiated by dragging anywhere on the screen. Grab and Drag also recognizes mouse 'Flick' gestures for scrolling up, down, left, or right a screenful at a time, and supports page 'Momentum', allowing a page to continue scrolling when dragged at a constant velocity and released.

The extension provides three ways to easily toggle functionality on and off:

A toggle icon can be added to the toolbars via View > Toolbars > Customize...
Alt-Shift-D toggles functionality on and off
The new 'TextToggle' feature allows grabbing to be temporarily disabled simply by double-clicking text in the webpage. Clicking non-text reenables dragging.

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