Firefox bypass HSTS limitation

Firefox won’t let you click “add to exception” option. Why? REDDIT post

Here is how I tested on my Mac Firefox v68,

Disclaimer: USE as your own RISK, you know what you are doing. May HARM your computer or system.

Step to disable HSTS

// Goto about:config

1. search `network.stricttransportsecurity.preloadlist`
2. Set its value from True to FALSE

Done ~~ 

Then I can let the site I wanna visit add to exception list.

Sample demo, this site SSL cert is expired.

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Credit: Photo by Yeo Khee on Unsplash