After recent upgrade, GhostText disconnects from editor after 30 seconds

Description and repro

Sometime in the last few days GhostText stopped working properly on both my Linux computers. I suspect it has to do with the recent GhostText update (Firefox says "Last Updated June 30, 2024" for GhostText on about:addons).

The content of the text area appears in my editor (Emacs using https://github.com/alpha22jp/atomic-chrome), and I can edit it, and if I close the editor buffer within 30 seconds everything works normally.

But almost exactly 30 seconds after I click the GhostText button in Firefox, the editor buffer closes (just as if I closed it manually), but GhostText in Firefox appears to still be active (green tickmark on GhostText icon) so I cannot easily enable the editing again without reloading the web page.

The 30s seems to be if the editor is idle. If I type in the editor more or less constantly, I can see the edits in the Firefox text area, and the connection lives for a little longer, around 55 seconds.

This could of course be an Emacs problem, but I tried snooping on the Websocket traffic between Firefox and Emacs using Wireshark, and I can see that Firefox/GhostText sends a "WebSocket Connection Close" packet exactly when Emacs closes the buffer.

I realize Emacs is not officially supported and I have not tested in Chrome, but it seems like a clear regression in GhostText (or maybe something triggered by a recent Firefox update)

Browser(s) tried

Firefox

Editor(s) tried

Emacs