I am unable to find the menu option under "Web Developer Tools" -> "..." drop down menu as described at the below page. https://extensionworkshop.com/documentation/develop/debugging/#debugging-popups Also manually changing the "about:config" properties related to "devtools.popup.disable_autohide" and "ui.popup.disable_autohide" appear to have no effect at stopping html popups from being hidden when selecting the web developer tools window. Is anyone else able to make this work? I found the following curious commit which makes it sound like it may have been disabled on purpose, but I'm uncertain. https://git.progress-linux.org/packages/engywuck/firefox-esr/commit/browser/app?h=debian&id=a7c8db0d7d4a7493e340a0cd3a41da435ef45823 "author Daniel Baumann <daniel.baumann@progress-linux.org> 2021-03-11 04:07:20 +0000 committer Daniel Baumann <daniel.baumann@progress-linux.org> 2021-03-11 04:07:20 +0000 commit a7c8db0d7d4a7493e340a0cd3a41da435ef45823 (patch) tree c3d79096d0a92925e4d9a7878128ad775c4086b5 /browser/app" +// Disable autohide for DevTools popups and tooltips. +// This is currently not exposed by any UI to avoid making +// about:devtools-toolbox tabs unusable by mistake. +pref("devtools.popup.disable_autohide", false);