I'm relatively new to roll20.net I've just been setting up my campaign, we haven't done any playing, yet, although, a couple of the players logged in just to prove that it worked. I recently decided to add a deck, called Harrow Deck, to tie-in with the campaign... I had previously opened settings for the default deck, and didn't imagine I would use it. I had no trouble creating the custom deck, but when I was finished and clicked "Show" it opened a small pop-up on the virtual desktop, without any apparent deck inside; but, after I scrolled around, it showed a "Shuffle" link, which I clicked... After that there was nothing visible in the pop-up window whenever I clicked "Show" after clicking "Hide". I tried Show-ing the default deck and it also had a Shuffle link, which I clicked, and then it demonstrated the same non-functionality as my custom deck. I went searching for documentation as to what I must be doing wrong, but, I couldn't find anything relevant to the issue I was having... the videos and deck-creation documentation always showed the decks animation appearing automatically when the decks were Show-n... That's when I created my first topic in the Community Forums. This was the day after I had had a complete outage of access to my Images, that was restored after disabling the AdBlockPlus add-on in my browser... I hadn't re-enabled it, since, but I went in and disabled every add-on, and none of that solved the problem with the decks. I created some more Community Forum topics, and even found another topic reporting the same problem I was experiencing. Several people suggested that I just use Google Chrome as a work-around, but I *hate* Google Chrome. Finally, I asked a friend to let me log-in to Roll20.net on their computer with Google Chrome, and I opened my campaign, and clicked the Show button for the Harrow deck and it worked! So it seems that the issue is with Firefox, EXCEPT... When I went back and logged in with Firefox on my computer, and re-opened my Campaign, the deck was still visible on the virtual desktop, along with the cards I had drawn while using my friend's computer. My friend then logged off, and the deck didn't disappear. I then clicked on Recall, and it opened up the pop-up, and I checked the Shuffle after Recall check-box, and clicked the button to execute. I was able to draw cards. I will continue experimenting to see if I can re-create the problem initially discovered, shortly. I do not use anti-virus software, unless I get one, and then it is usually just a temporary installation of Malwarebytes. There is not anti-virus software running on my machine that I am aware of at the moment... I am running Windows7 Professional 64-bit just auto-updated to Firefox 35.0.1 this morning, but there was no improvement when I opened my campaign before the Google Chrome test. I have no browser add-ons or extensions enabled, and I have not expressly disabled javascript, so I imagine that it is enabled and running, but I have turned off all kinds of cookies and history logging. Here's the Console Log from the CSS tab [from CTRL+SHIFT+K] as of just now (since reopening the campaign fresh after the test on friend's computer): Error in parsing value for 'background-image'. Declaration dropped. base.css:1 Expected colour but found 'top'. Error in parsing value for 'background-image'. Declaration dropped. base.css:1 Expected 'none', URL, or filter function but found 'progid'. Error in parsing value for 'filter'. Declaration dropped. base.css:1 Unknown property '-moz-border-radius'. Declaration dropped. base.css:1 Expected 'none', URL, or filter function but found 'alpha('. Error in parsing value for 'filter'. Declaration dropped. base.css:1 Unknown property '-moz-box-shadow'. Declaration dropped. base.css:1 Unknown property '-moz-background-clip'. Declaration dropped. base.css:1 Expected declaration but found '*'. Skipped to next declaration. base.css:1 Unknown property 'zoom'. Declaration dropped. base.css:1 Error in parsing value for 'background'. Declaration dropped. base.css:1 Expected colour but found 'top'. Error in parsing value for 'background'. Declaration dropped. base.css:1 Unknown property '-moz-border-radius-bottomleft'. Declaration dropped. base.css:1 Unknown property '-moz-border-radius-bottomright'. Declaration dropped. base.css:1 Expected font descriptor but found 'url(data:font/truetype;charset=utf-8;base64,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 base.css:1 Unknown property 'speak'. Declaration dropped. base.css:1 Expected media feature name but found '-webkit-min-device-pixel-ratio'. base.css:1 Expected media feature name but found '-o-min-device-pixel-ratio'. base.css:1 Expected media feature name but found 'min-device-pixel-ratio'. base.css:1 Use of getPreventDefault() is deprecated. Use defaultPrevented instead. jquery.min.js:2