Browser Page looks messy

Question

To develop websites I use domino designer v9.01 with OpenNTF Bootstrap extension library v14. I am new to IBM domino so have mercy … The trouble I have is : While previewing XPage apps in Notes all controls, views etc. are there and looks as expected. But when I preview same XPage apps in a web browser (newest FireFox, newest Microsoft Edge) I get messy results. To be more specific, the amount of controls, views, etc. are there and they also work. But their expected design is messy. I cannot describe it better because I have never seen such pages before.

Finally the question is : Why is the presentation of XPage apps in Notes perfect while in a web browser not ?

UPDATE

Here are 2 screenshots to visualize the problem. First screenshot is from Notes showing expected UI. Second screenshot is from FireFox browser showing non-expected UI which i call "messy". The content you see is a simple example from a tutorial. So do not wonder about that.

Answer 1

The Extension Library plugin will also need to be installed on the server as well as into Domino Designer. The usual process for this is using an UpdateSite database, as documented here http://www-10.lotus.com/ldd/ddwiki.nsf/xpAPIViewer.xsp?lookupName=XPages+Extensibility+API#action=openDocument&res_title=XPages_Extension_Library_Deployment&content=apicontent