I’m developing a plugin that adds a metabox to the post editing page.
When I try to debug it with Firebug, about every 15 seconds the Firebug display refreshes as though the page has reloaded. This collapses the code tree and loses my place, so I have to start from scratch… and get where I want within 15 seconds.
I’ve disabled all plugins, so I assume this is standard WordPress behavior (version 4.0).
Is it possible to prevent this auto-refresh, or to otherwise make Firebug usable on the post editing page?
Per comments, an alternative is to use the built-in Firefox debugger instead (Inspect Element (Q)) – it’s very good (now) and is (almost completely) unaffected by the WP heartbeat.
I just found a way around the problem, but it’s a kludge, so I won’t accept my own answer unless nobody has a “real” solution.