Windowless Silverlight App Takes One Click To Give The Object Tag Focus And Another Click To Interact With The Actual Silverlight App




10 years ago
7 years ago


(Reporter: troy.kinsey, Unassigned)


3.5 Branch
Windows Vista

Firefox Tracking Flags

(Not tracked)




10 years ago
User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv: Gecko/2009032609 Firefox/3.0.8 (.NET CLR 3.5.30729)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv: Gecko/2009032609 Firefox/3.0.8 (.NET CLR 3.5.30729)

I'm developing Silverlight apps for my company's back-end UI and Firefox does not treat Silverlight apps the way IE8 does with interaction and focus. In Firefox, I have to click on the object tag once to give the object tag focus and then click again to actually interact with the Silverlight app. This is giving my users the appearance that they clicked on a button and it doesn't work, but in reality their click only gave focus to the object tag. IE8 does not have this issue.

Reproducible: Always

Steps to Reproduce:
1. Open a web page that contains a silverlight app. The app must have the param tag set to windowless
2. Click on the silverlight app. You'll notice that the object tag gets a dotted border on it, indicating that focus was just given to it.
3. Now click on a button or something that allows you to interact with the app.
Actual Results:  
Once you click on the object tag, it's given focus.

Expected Results:  
I would expect the user to directly interact with the Silverlight app and not need to double-click it.

The Silverlight app should act like a HTML control in that clicking over a button should give the Silverlight app a click event without the need to give the object tag a manual focus first.
Does this still happen in Firefox 3.5 or later with the Silverlight 3 plugin?
Version: unspecified → 3.0 Branch

Comment 2

10 years ago
This is still occurring in Silverlight 3 and in Firefox 3.5.x.


10 years ago
Version: 3.0 Branch → 3.5 Branch

Comment 3

9 years ago

I can't replicate the problem reliably, but have noticed another issue that may be related:

It seems when you set focus on the Silverlight control, the browser pops scroll bars on both right and bottom.  When you take focus off of the window, the Silverlight control fills the screen as expected.
WFM, latest nightly, silverlight 4.0 beta.
Reporter, does this happen still with Firefox 4 and the latest silverlight?
Reporter, please update to Firefox 5, create a fresh profile,, and then retest. Then please report your results.
Whiteboard: [CLOSEME 2011-07-31]


7 years ago
Last Resolved: 7 years ago
Resolution: --- → INCOMPLETE
Whiteboard: [CLOSEME 2011-07-31]
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