Sometimes simply clicking/pressing back button helps. Try both Mobile version/view options at the top and the bottom of the page. If nothing works, try logging out of you account and log in after some time.
Maybe you clicked another desktop button, not the bottom one. Press where there are the 3 buttons (like when you want to access a new tab, favorites, downloads, search history etc...). There is also a desktop option here maybe you need press that again ?
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