How does Facebook disable the browser's integrated Developer Tools?

Digital Marketing Facebook Marketing API 2 years ago

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Posted on 16 Aug 2022, this text provides information on Facebook Marketing API related to Digital Marketing. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.

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manpreet Tuteehub forum best answer Best Answer 2 years ago
_x000D_ I'm a security engineer at Facebook and this is my fault. We're testing this for some users to see if it can slow down some attacks where users are tricked into pasting (malicious) JavaScript code into the browser console. Just to be clear: trying to block hackers client-side is a bad idea in general; this is to protect against a specific social engineering attack. If you ended up in the test group and are annoyed by this, sorry. I tried to make the old opt-out page (now help page) as simple as possible while still being scary enough to stop at least some of the victims. The actual code is pretty similar to @joeldixon66's link; ours is a little more complicated for no good reason. Chrome wraps all console code in with ((console && console._commandLineAPI) || {}) { } ... so the site redefines console._commandLineAPI to throw: Object.defineProperty(console, '_commandLineAPI', { get : function() { throw 'Nooo!' } }) This is not quite enough (try it!), but that's the main trick. Epilogue: The Chrome team decided that defeating the console from user-side JS was a bug and fixed the issue, rendering this technique invalid. Afterwards, additional protection was added to protect users from self-xss.

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