Title: I have a Firefox plug-in, &quot;Ad Limiter&quot;[1].  Recently, the number of users as logged by Mozilla&#x27;s AMO site began to climb rapidly. When Firefox checks for updates daily, it reports the installed plug-ins to Mozilla, and Mozilla publishes those statistics.<p>The rate of increase in users exceeds the number of downloads. At first I thought Mozilla&#x27;s statistics system was broken.  But that&#x27;s not the problem.[2]
Someone is apparently distributing some form of malware which seems to be impersonating Ad Limiter.  They&#x27;re using Ad Limiter&#x27;s Mozilla AMO ID number, but a random version number.  (Real version numbers are 1.3 to 2.0. Fake version numbers range from 2.17.71 to 1009.99.992.  All bogus versions have three-number versions, while all legitimate versions have two-number versions.<p>All this is inferred from Firefox statistics logging. We haven&#x27;t seen the actual malware yet.  If anyone has a copy of Firefox with Ad Limiter installed, and the version isn&#x27;t between 1.3 and 2.0, we&#x27;d really like to see it. Please save a copy of the Firefox add-ons directory before deleting the bogus add-on, and send a copy of the bogus add-on to &quot;info@sitetruth.com&quot;.  We want to see what this malware is doing in our name.  Thanks.<p>[1] https:&#x2F;&#x2F;addons.mozilla.org&#x2F;en-US&#x2F;firefox&#x2F;addon&#x2F;ad-limiter&#x2F;
[2] https:&#x2F;&#x2F;bugzilla.mozilla.org&#x2F;show_bug.cgi?id=1152966
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