Thanks Chris, for this catch.
With the new connection plugin I splitted the connection pages. The two pages "Network paramter" and "Authentication" were moved to the connection plugin, however the "Browser options" page is still located in the browser plugin. At runtime they are loaded using the Eclipse extension mechanism.
I haven't added any order to these pages, because the browser plugin depens on the connection plugin, so the connection plugin is loaded first. I didn't run into that problem and I thought that the connection pages are loaded in the same order as the plugins.