I-Firefox Isithangami Sokwesekwa

I've recently started using the Tree Style Tab extension, and I'm finding it useful, but I'd like it if the list of tabs could be automatically hidden when only one tab is open (and automatically shown when more than one tab is open).

I hoped to write an extension to do this, but opening the sidebar from an extension requires a user gesture, so I suspect I'll have to use a userchrome.js script.

From a "userchrome.js"-like environment (i.e. unsandboxed AutoConfig), I can hide and show the sidebar with `SidebarUI.hide()` and `SidebarUI.show("treestyletab_piro_sakura_ne_jp-sidebar-action")`, and I can examine the tabs open in the current window via `gBrowser.tabs`, but I can't see how to get notified when the number of tabs changes (replacing `gBrowser.tabs` with a proxy doesn't work, for example). I suppose I could just check every few seconds? That feels like a bit of a cop-out, though, and gets more and more inefficient the more windows are open.

There's an API for extensions to receive events when tabs open and close, so clearly this is possible. Where should I be looking for this functionality?

(I also don't know how I would go about unregistering an event listener (or cancelling a setInterval call!) when the window closes, assuming that's necessary to avoid leaking resources – is there an event like `chrome-document-global-created` I could listen for, but that fires during teardown of the window rather than when one is created?)

My primary/default browser is Firefox on Sonoma 14.4.1, and recently I'm unable to use the inputs of my audio interface for google hangouts. The relevant output is correct, and my system audio would be the same.

When attempting to load a number of different web pages such as Quickbooks Online Apps, the page displays "Loading Apps..." with a spinning wheel, but never redirects to the Apps page; the site hangs forever. On other browsers there are no issues; it eventually switches to the correct page. In Firefox Browser I have tried adding exceptions in Settings --> Privacy & Security --> Manage Exceptions. No change. Thoughts?

Just transferred from old MacBook Pro to new one. Successful migration except: The icon for the WE Transfer service doesn't show up in the narrow black ribbon at the top of the Firefox page - instead there's a blue exclamation point in a blue circle. Clicking the blue circle/exclamation point takes me to the WE Transfer page. What do I need to do to get the actual icon to replace the blue circle/exclamation point? Thanks in advance.