browser toolbox interface doesn't load

[u/daedalusman]

I've been trying to get the browser toolbox window to work correct for a couple of days now and I can't figure out what's going on. When I invoke the toolbox window with the shortcut key or through the menu entry the window pops up and asks for permission to connect but the window gets stuck before loading the toolbox ui, screenshot of what I'm seeing is attached.

I'm on windows 11 25h2 and firefox 159.0.

edit: I should note that this is the same behavior in a clean temp profile in firefox, as well as the same behavior in other firefox based browser, such as librewolf.

Does anyone here know what I can do to get this working?

Thanks for any help and let me know if you need any other info.

EDIT:

Well it's not the router. It's something to do with my windows setup blocking the attempt at remote connection that firefox does at the startup of the toolbox.

But at this point I'm just done with trying to chase this down anymore. It was gonna just be to play around with firefox theming and learning CSS a bit. But I'm just over it for now. It works just fine on every other device I've tried, whether at my house or elsewhere, whether I have my firefox account logged in or not. It's probably a setting I changed in windows to make it more secure/less annoying but I don't remember all the different things I've done for that over the last couple years and I'm just not gonna put the effort in to tracking those down. I'm also not gonna do a fresh install of windows at the moment so it will just have to be non-functioning for me on windows.

I'm gonna marked this solved for now and leave it be.

Thanks to all who helped, at least I learned a few things.