Simon Willison’s Weblog

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Microbrowsers are Everywhere (via) Colin Bendell introduces a new-to-me term, “microbrowsers”, to describe the user-agents which hit websites to generate unfurled link previews in messenger apps. Twitter and Facebook first popularized them, but today you’re likely getting far more preview-generating traffic from chat clients such as iMessage, WhatsApp and Slack (which won’t execute script and ignore cookies, and hence won’t show up in Google Analytics). Lots of great tips here—one example: if you provide three og:image meta tags iMessage will render them as a collage. # 18th December 2019, 8:32 am

Specify your canonical. You can now use a link rel=“canonical” to tell Google that a page has a canonical URL elsewhere. I’ve run in to this problem a bunch of times—in some sites it really does make sense to have the same content shown in two different places—and this seems like a neat solution that could apply to much more than just metadata for external search engines. # 14th February 2009, 11:28 am