On iOS you can use Stop The Madness's "Protect Text Selection" option, costs $8 but fixes all sorts of modern web annoyances

https://apps.apple.com/us/app/stopthemadness-mobile/id158308...

Setting an appropriate user style using something like Stylus to override it should work. See how this one does it: https://userstyles.world/style/2264/unblock-algoexpert-text-... If you can't set user styles in your browser, you might not be able to accomplish it, though.

you could add a css snippet for `* { user-select: all ! important }` to override any occurrences of that property

unless the site already did that, so you'll have to out-override them by applying an id to the outer html tag and doing the ol'

    #useroverride#useroverride#useroverride#useroverride#useroverride#useroverride#useroverride#useroverride#useroverride#useroverride#useroverride#useroverride * {user-select: all !important]

or whatever

However if the style is inlined to the element and given an !important, you're SOL.

Surely the cascade means that the user applied style with the same 'score' takes preference?

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