For me it depends on what I'm doing. I too like the edit and resend ability in firefox dev tools but what I've found it lacking is the option to automatically open dev tools for pop ups, which is possible in chrome.
There is a beginning of solution for popups in Firefox DevTools.
You can toggle `devtools.popups.debug` preference [1] to true in about:config
and DevTools should open on popups.
Unfortunately, there is some limitations, highlighted at the end of that bugzilla entry. It won't work for <a target="_blank">, while it should work for window.open usages.
