User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.8) Gecko/20100722 Firefox_CustomJBU_784596/3.5.4 (.NET CLR 3.5.30729) Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.8) Gecko/20100722 Firefox_CustomJBU_784596/3.5.4 (.NET CLR 3.5.30729) I am trying to update the DOM on an onDragOver event from a file. Nothing in the DOM will change, but I can see the names of events which are logged with console.log. The DOM updates when the file ceases to be dragged over the window. Reproducible: Always Steps to Reproduce: 1. Create onDragOver event with JavaScript 2. Drag a file into the window without releasing 3. Drag file out of window Actual Results: DOM was updated after dragging file out of window Changed general.useragent.extra.firefox in about:config for development.

Here's a set of files that duplicates the problem: http://dl.dropbox.com/u/315008/fix-filedrop.zip

Also does not work on this site: http://demos.hacks.mozilla.org/openweb/uploadingFiles/

This bug also effects Firefox 4.0 Beta 3

With your testcase I don't understand what "DOM updates" I am expected to see while dragging a file over the page, your handler only sets "dragenter" attribute, which as far as I know is not supposed to cause any visual changes. Can you describe more clearly what do you expect to happen and what happens instead?

(In reply to Nickolay_Ponomarev from comment #4) > With your testcase I don't understand what "DOM updates" I am expected to > see while dragging a file over the page, your handler only sets "dragenter" > attribute, which as far as I know is not supposed to cause any visual > changes. Can you describe more clearly what do you expect to happen and what > happens instead?

Resolved per whiteboard

In the two-and-a-half years since this has taken to get looked at, I no longer have access to any of the original equipment or software. I'm just going to assume this works. I suppose I could also chalk it up to just having learned this set of tools at the time. Probably not a browser bug.