Does modern Firefox have a context menu "This Frame"> "Inspect element"?

I am aware that I can see the elements within an iframe in the inspector, but I need to run a javascript snippet in the console against the iframe's contents. That's of course forbidden by the gods of the internet (this is even a set of local html files, not that it makes any difference).

I need to do this between 100 and 180 times (don't have an exact count), and right-clicking "open this frame in a new tab" just so I can then bring up devtools is getting to be a major pain in the ass. Is it possible to enable something in about:config to make this more direct?

Willing to switch to Chrome temporarily if it has this functionality.

On the devtools console on the right, there's a miniature paneled screen. Click it to set the context for all devtools panels, including DOM Inspector and the JS console. I created a small HTML file with an embedded YT video, so those are the choices in the screenshot below.