Q. There is a chair on the top right corner what does it do?
A. The chair icon toggles Readability view. When Readability is active (chair highlighted dark blue), web pages will be presented in a view that is optimized for the mobile browser. When Readability is off, the page will be shown as normal.
You can tap the chair icon at any time to toggle Readability on/off and the setting will be remembered until you next change it.