Does Chrome on Ubuntu have smart zoom?
What is "smart zoom"? It is common for web pages to have a content column with extraneous columns on either side (for ads, navigation, social media nonsense, etc). A lot of the time, the font in the content column is too small. Or the extraneous columns are distracting. With smart zoom, you two-finger double-tap the content column, and it expands to fill the browser window, expanding the font and crowding out the side column(s).
Here is a page you can use to test. Double-tap the story, and see it expand. Double-tap again, and it recedes. Then double-tap the right side-bar and see it expand.
BFL