Today, I published the first version of Ad bar disabler to the Chrome Web Store. This addon removes the sidebar from Outlook.com (non-premium) and as a result provides more space for reading, viewing and composing emails.
To install on Google Chrome, just download it from the Chrome Web Store. For Microsoft Edge Chromium, you need to Enable the “Allow extensions from other stores” option from the Edge three dot menu (…) Menu > Extensions as seen below.
Download the Extension here
Download the New Microsoft Edge Chromium here