Tried this on Firefox for Android but the table of contents takes up half the screen width ways, and I couldn't figure out how to get rid of it. Plus, it froze

Tried this on Firefox for Android but the table of contents takes up half the screen width ways, and I couldn't figure out how to get rid of it. Plus, it froze the browser when I backed out of the page. Also it's quite slow to load the WASM, about five seconds before it starts processing the PDF. This is on a fairly recent mid-range Samsung phone (Galaxy A52s 5G). Edit: turns out it's View -> Outline to remove the contents pane. There's no "fit to page" option so I still couldn't see the whole page - the 50% zoom out option wasn't sufficient to see everything corner to corner.