User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; rv:1.7.3) Gecko/20041001 Firefox/0.10.1 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; rv:1.7.3) Gecko/20041001 Firefox/0.10.1 On some webpages when I make a mouse scroll over an gif animated picture the picture is moved Reproducible: Always Steps to Reproduce: 1. Go to this webpage http://www.anandtech.com/news/shownews.aspx?i=23391 2. Make a scroll over an animated gif image 3. The gif scrolls some lines Actual Results: I don't know if this is normal to happen, I gues not. Expected Results: I gues scroll on gif animated pictures is a bug not a feature When I make a scroll over an animated gif only after the gif is scrolled some lines the webpage is scrolled
The same problem Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.5) Gecko/20041110 Firefox/1.0
The banner is actually (or nowadays) a flash object in an IFRAME, and scrolls in its own frame. Which may be a bug but not GIF related anyway. The page (containing the flash or agif) is a few pixels too large for the IFRAME, and so it scrolls... Changing subject...
This problem is coming when the image or any text is placed within an IFRAME with the SCROLLING attribute set to "NO". I have observed this behavior in many sites where the advertisement images are placed in IFRAME. Also this is the case with Google advertisements placed in IFRAME. This does not occur in Internet Explorer. In IE when the SCROLLING=no is used, it will not scroll within the IFRAME even if the content is beyond the display area. I thinks this is a bug in Firefox which needs to be fixed. I haved added a small testcase for this. The testcase contains a zip file with two HTML pages; iframe-test.html and test.html. Just open the iframe-test.html in Firefox and use the mouse-wheel to scroll-down/up and notice the behavior of the IFRAME. Also do the same in Internet Explorer.
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What Alfred describes is not a bug with Firefox, but just bad web design. And Satish's testcase works for me -- the iframe doesn't scroll. So assuming that the iframe is using scrolling=no and the content in it is larger than the frame itself this is WFM.