Hi Luara,
I can understand why you don’t want to spend another day hunting for that setting. From what you described, the setting you remember may be Display scale, which is separate from the text-size and accessibility options you already tried.
Open Settings > System > Display, then look under Scale & layout. Note the current Scale value, change it temporarily to another option and then change it back to the one marked Recommended. While you’re there, check that Display resolution is also set to Recommended. Afterward, sign out of Windows and sign back in so the settings can refresh fully.
If you have more than one monitor, select each display at the top of the page and check its scale individually.
Is the text also tiny in places such as File Explorer and Settings, or is it limited to the browser menus? It would also help to know the current Scale and Display resolution values and whether you’re using an external monitor. Those details should help narrow down whether this is a Windows-wide scaling issue or something limited to the browser.