Reader view in Firefox is built into the address bar. Go to the web page you want to read and click the Toggle reader view icon in the address bar or press F9. Toggle reader view in Firefox The Toggle reader view icon turns blue and Firefox removes all the extra items on the page and centers the text and images in the article for better readability. Estimated reading time on Reader View in Firefox When you’re in reading view, a toolbar displays on the left side of the tab. The top button allows you to turn off reading view. Clicking the blue Toggle reading view icon will also turn it off. The button with letters on the reading view toolbar allows you to adjust the font style, font size, margins, spacing, and background color. The next button enables audio narration and the bottom button saves the page to Pocket for later reading. Reader View in Firefox