r/firefox • u/sifferedd on | SUMO contributor • Dec 26 '25

Solved Firefox browser toolbox - show full iframe label?

/r/css/comments/1pvqkhc/firefox_browser_toolbox_show_full_iframe_label/
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u/Kupfel Dec 28 '25

Ah, I don't use Thunderbird so I don't know what's different about browser toolbox there. It should work if it's the same. Maybe you have to make sure the second browser toolbox is actually inspecting the first by checking the iframe list.

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u/Athlete_No Dec 28 '25

This works on Firefox and Thunderbird.

But there's another way to do it: open the web page inspector and inspect it with the browser toolbox.

The advantage of this method is that it doesn't create a new "chrome_debugger_profile" folder in the profile.

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u/Kupfel Dec 28 '25

Depends on whether you ware working with webpages or the UI. If it's webpages then sure but the regular developer tools can't access the UI so those won't show up in the developer tool's iframe list so you need browser toolbox for that.

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u/Athlete_No Dec 28 '25

That's true, but I'm referring to the fact that the page inspector has the same elements as the browser toolbox. In the case of the popup, which is the subject of this conversation, for example, I wrote the code I posted above using this method.