I'm using a wide screen. Starting with a narrow browser window, and gradually pulling the window out to make it wider, this is what happens, in order:
- The text initially flows around the infobox, contents list and images, which all fit within the window boundaries (expected)
- The white margins get gradually wider (expected)
- The infobox and the right-hand images suddenly pop out of the text area into a new right margin, cutting into the overall width. The text area becomes narrower (not expected)
- Finally, the contents list and left-hand images suddenly pop out of the text area into a new left margin, cutting further into the overall width. The text area becomes narrower again (not expected), and at the same time the font size of the main text increases (not expected).
On my screen, with a typical article [[Selwyn College, Cambridge]], at level 1 the text area has a width of 23 cm, with 13 words fitting into the first line. By level 4, there is a much narrower text area of only 9 cm, and with the larger font only the opening 3 words of the lead will fit into the first line.
The result is that when I need to use a wide browser window, because for example I'm looking at Google maps, I can't use that same window for Wikipedia at all (because when I switch to a Wikipedia tab the page has become pretty well unreadable). This is surely not useful behaviour.
In case it's relevant, I'm using Firefox 81.0 on a Mac.
