Ondersteuningsforum voor Firefox

I would like to inspect the rendered HTML elements in the iframes, at sites like codepen, codesandbox.

However, the iframe context selector button doesn't show up. Its also greyed out in the dev tools settings, and as visible in the image, I have the required option enabled.

This feature works as intended, in the default versions of Firefox. Tried Firefox Beta version 89.0b9.

I am on Windows 10, using Firefox Developer Edition version 89.0b9.

XML Parsing Error: syntax error Location: http://localhost:8888/api/3-airtable Line Number 1, Column 1:

It fetch API form this in JSON -> const { data } = await axios.get('/api/3-airtable') When open in Chorme but doesn't had this error What happened in frifox developer last version

Firefox Browser 89.0b6 (64-bit) Developer Edition Windows 10 Pro 20H2 Build 19042.804 Feature Experience Pack 120.2212.551.0

I currently have two displays connected, the 2nd display is positioned above my primary display, the two displays are arranged as such in the Display settings.

With Firefox open on my primary display; if the window is Maximized, it extends several pixels beyond the top of the screen and onto the second display above.

If I go into Display settings and rearrange the displays so that Windows behaves as though the 2nd display was actually to the right of the primary display, maximized Firefox windows to do not extend onto the 2nd display.

From what I have observed (a handful of various browsers, notepad++, office applications, adobe reader, explorer, cmd, and other miscellaneous software), this seems to be specific to Firefox.

It appears to be that Firefox is drawing itself slightly beyond the top of the desktop when maximized.

It is enough to cover approximately the lower two thirds of the information in the 'status bar' area of the windows on the 2nd display.

Is this a known issue? Is there some a way to fix this? Is this somehow not an issue with Firefox despite it only happening with Firefox?

Any help is appreciated.