Full page screenshots in Firefox

Firefox has an interesting feature called the Developer Toolbar. This toolbar is entirely separate from the JS console and provides a cli for custom commands for specific functionality. It can opened with shift-F2 or Tools > Developers > Developer Toolbar.

In that toolbar, type:

screenshot --fullpage my-page.png

A png file with the given name will be saved to the Downloads folder. The file format will always be png.

Source

More Developer Toolbar information can be found here.

Type help in the toolbar to see all the commands.

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