What usually happens is that the page loads with the plugin list(s) blank, and as information is retrieved it slots them under up-to-date, out-of-date, and don't-know. I don't know whether you ran into a temporary glitch, or whether the specific missing or outdated plugin was an issue. Does it work any better to just load the page directly from a link?<br>https://www.mozilla.org/plugincheck/ ---- If it's still not working for you, could you try the page in Firefox's Safe Mode? That's a standard diagnostic tool to bypass interference by ''extensions'' (and some custom settings). Your plugins will still be active and available for research. More info: [[Troubleshoot Firefox issues using Safe Mode]]. You can restart Firefox in Safe Mode using Help > Restart with Add-ons Disabled In the dialog, click "Start in Safe Mode" (''not'' Reset) Any difference?