Two new preview devices made a brief appearance, then appeared to be sold out online.
Announcements from browser makers last week may recall the bad old days of browser incompatibility, but this isn't IE6 all over again.
There could be big changes coming to the fiddly and sometimes annoying Web browsing experience on cellphones.
Experimental engine for next Web coming to Android, ARM processors
The new Firefox for Android supports private browsing on a per-tab basis.
The online ad industry attacked Mozilla over its decision to block third-party cookies in a future release of Firefox, calling the move "dangerous and highly disturbing," and claiming that it will result in more ads shown to users.
Currently, there are numerous options with potentially 'disastrous' consequences, one Mozillian says.
Mozilla, Ericsson, AT&T will show the web technology's video, voice calling, and file-sharing chops at the Mobile World Congress this week.
Mozilla Tuesday released Firefox 19, adding a built-in PDF viewer to the browser and patching 13 security vulnerabilities.