1. I have a web grid inside of splitter that hides my context menu when rendering in Firefox.
2. I have a modal popup that is being shown but the right side pane of my splitter is taking the focus from my actual popup. Can't figure if it's a z-index issue or what. This also only happens in Firefox
Hi,
If you mean ModalPopup from AjaxToolkit, then various unusual things may happen. Particularly it sets fixed positions for elements and huge zIndexes. That is quite a challenge for an application if it uses elements on page with relative (like webgrid) or absolute positions, or if application uses its own external popups with smaller zIndexes.
If it is that ModalPopupExtender, then since source codes are available and you may fix and recompile them, then you may consider to reduce/remove zIndexes and maybe replace fixed positions by absolute.