Ever since Firefox 18.0.1 I can not do the automatic check of plug ins. I go to the Add On Manager, click on "Check if your plug ins are up to date" on the left upper corner and then Firefox freezes. Getting a "This program is not responding" message. I can do the check for updates on plugins but I can not go to the pages where the add ons are checked.
Mozilla is having problems with the plugin check page right now. I suggest you wait until those issues are resolved.
Add-ons are checked online, you simply go to Tools > Add-ons, click the gear icon and select the check for updates menu item.
Wonder why they do not put a warning there? That page is still crashing Firefox (just did try it) but there is no warning or whatever. Why keep it live when they *know* there are problems with it?
Okay, just tried safe mode but it is indeed still not good: it will go to the page but then Firefox completely freezes. The green spinning circle will come up but then the freezes. Page is loading the blue background ... and then it freezes.
Disable one plug-in at a time, then try again. It could be that the way the pluginchecker calls a plugin is invalid.
Go to Tools > Add-ons > Plugins. Then click one plug-in and click the Disable button.
Okay, found it! Problem is caused by the Java Deployment Toolkit 18.104.22.168 (10.13.2.20). The Java Platform SE 7 U13 10.13.2.20 plug in works just fine. But why does it crashes in safemode then? Or are plugins loaded in safe mode but add ons are not?
Yes, plugins are not disabled in Safe Mode. They can only be disabled manually.
It might be worth filing a bug report against Plugins for this issue. Or you can wait until Oracle releases an update and see if this fixes it!