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Try Facebook Lite. It's designed for low powered phones.

And on Android use Tinfoil. It's FB for those of us who just look at it occasionally and don't want it tied into everything we do on the device.

I tried installing Facebook Lite in the Google Play store but it says "This item isn't available in your country". I live in the US.

They intend for it to only be used in countries with slower internet. You can download the apk from http://www.apkmirror.com/apk/facebook-2/lite/ and it will work.