I try to keep track of what all the browsers add to their developer tools, but somehow I missed this. In a recent Firefox update, they finally added a "Storage" tab to the developer tools. For some reason, this tab was deselected in my Firefox. I only knew it existed when I opened up the options looking for something else.

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Once added, and selected, you will then get the ability to view cookies, IndexedDB databases, and Local and Session Storage. (No WebSQL since Firefox doesn't support it.)

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Expanding the IDB section, you can browse the structure of local databases:

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And when you click an object store, you will see a list of data. If you click one row, you get details:

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This will be very handy for folks working with local data. (And reminds me I need to give my presentation on this topic again!)

p.s. The title of this post says it was the "latest" Firefox that added this but honestly I may have missed it from an earlier update.