With utmost respect, I just tried Fiddler Everywhere and I am dumbfounded this ability wasn't (and still isn't) natively incorporated. What possible reasoning is there for this, especially given it was doable in Fiddler Classic?

Context filtering is such a simple, easily implementable function, one which doesn't add visual clutter/fluff, and which saves inordinate amounts of time when cutting back captures.

So shocked am I at the prospect that this wouldn't be incorporated that I've been left- and right-clicking every nook, corner, button, and icon possible, thinking surely it must be tucked away somewhere.

If I'm not merely blind as a bat and overlooking it, as a suggestion, Sysinternals' Process Monitor takes this ability even further by, depending where you right-click along a row, popping a dynamic sub-context filtering menu, providing options to quick-add filters for that particular cell's data, and/or optionally open the full filter dialog pre-filled with this cell's data-filter, allowing you to further tweak before adding.

But at the very least, however, the basic ability to filter by context menu -- without one having to manually transcribe input by rote keyboard -- is definitely one that should be native to Fiddler, ...at least until a "Fiddler-Vim" ever gets released.