| object name | class | description |
| browser.bottombar | UI Zone | Bottom bar |
| browser.navbar | UI Zone | Navigation bar |
| browser.pagebar | UI Zone | Page tab strip |
| browser.statbar | UI Zone | Status bar |
| browser.tabbar | UI Zone | Tab bar |
| tab.engine | UI Zone | Main engine of the active tab |
| tab.toolbar | UI Zone | Custom tab toolbar |
| reqbuilder.toolbar | UI Zone | Request Builder toolbar |