# Browser Limitations

The following functional limitations are imposed upon popouts by the default behaviour of modern browsers:

## Positioning

All browsers position new windows relative to the top left of the Operating System’s main screen, but still have widely different behaviours with regard to positioning:

* Firefox: Works as expected, including negative positioning.
* IE: Same as Firefox, except does not allow negative positioning. This means a popout cannot be placed above or to the left of the Operating System’s main screen.
* Chrome: Can handle negative positioning like Firefox, but always places popouts on the same screen as the window that opened the popout. If a popout would be opened on another screen, it will instead appear at the edge of the screen containing the parent window.

## Title bar display

Currently, if you use browser popouts, the title bar will be displayed at the top of the popout. This is a browser limitation - however, this issue can be circumvented by using an app wrapper such as that provided by [OpenFin](https://www.openfin.co/), or a Chromium build. These are native installed applications that manage your own windows. Caplin doesn’t currently have any plans to build or maintain its own app wrapper.