problems on firefox

if I post or create thread this gets added to it:

<mytubeelement id="myTubeRelayElementToPage" event="preferencesUpdated" data="{"bundle":{"label_delimitor":":","percentage":"%","smart_buffer":"Smart Buffer","start_playing_when_buffered":"Start playing when buffered","sound":"Sound","desktop_notification":"Desktop Notification","continuation_on_next_line":"-","loop":"Loop","only_notify":"Only Notify","estimated_time":"Estimated Time","global_preferences":"Global Preferences","no_notification_supported_on_your_browser":"No notification style supported on your browser version","video_buffered":"Video Buffered","buffered":"Buffered","hyphen":"-","buffered_message":"The video has been buffered as requested and is ready to play.","not_supported":"Not Supported","on":"On","off":"Off","click_to_enable_for_this_site":"Click to enable for this site","desktop_notification_denied":"You have denied permission for desktop notification for this site","notification_status_delimitor":";","error":"Error","adblock_interferance_message":"Adblock (or similar extension) is known to interfere with SmartVideo. Please add this url to adblock whitelist.","calculating":"Calculating","waiting":"Waiting","will_start_buffering_when_initialized":"Will start buffering when initialized","will_start_playing_when_initialized":"Will start playing when initialized","completed":"Completed","buffering_stalled":"Buffering is stalled. Will stop.","stopped":"Stopped","hr":"Hr","min":"Min","sec":"Sec","any_moment":"Any Moment","popup_donate_to":"Donate to","extension_id":null},"prefs":{"desktopNotification":true,"soundNotification":true,"logLevel":0,"enable":true,"loop":false,"hidePopup":true,"autoPlay":false,"autoBuffer":true,"autoPlayOnBuffer":true,"autoPlayOnBufferPercentage":5,"autoPlayOnSmartBuffer":false,"quality":"default","fshd":true,"onlyNotification":false,"enableFullScreen":true,"saveBandwidth":false,"hideAnnotations":false,"turnOffPagedBuffering":true}}"></mytubeelement><mytubeelement id="myTubeRelayElementToTab" event="relayPrefs" data="{"loadBundle":true}"></mytubeelement>

What is this exactly? Why is it doing this? I have to post on IE or else it wont work right.

PLEASE HELP!