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How to use the Browser Guard in Rails Discussion

If you're building a no build Rails application that makes use of modern browser features (like ONCE Campfire!), you'll definitely want to use this.

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There is one trap to take care for: If your are using https://pagespeed.web.dev/ (Googles SEO tool) - you will get a -406 not acceptable - error. Looks like the pagespeed crawler is not recognized.

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That's probably a bug in the UserAgent bot check I would imagine.

https://github.com/rails/rails/blob/v7.2.0/actionpack/lib/action_controller/metal/allow_browser.rb#L88

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