"The Meta Pixel isn't firing" is one of the most common things I get called in to fix. The frustrating part is that "the pixel is installed" and "the pixel is firing" are completely different claims - and most dashboards happily say connected while the events never actually leave the browser. Here are the six causes I check, in order, each with a verification step you can run in a couple of minutes. First, know what you're looking for. A firing pixel sends network requests to facebook.c...