Display Document as Web Page
When people have only read or view access to documents in a library, they open in the native application. I think it would be a much better user experience for those users with only read/view permissions if the document opened as a web page instead (similar to how a PDF file opens in your web browser).
This would make it easier for designing sites where you want to share content with many people (everyone for example), but limit who can edit the content to only certain people.
This way I can add a promoted links web part to a page with links to key documents, and for users who have read/view access the experience would be a seamless web experience because they would not see the file opening in Word, Excel or PowerPoint but natively in their browser as if it were a web page.