Apple apparently restricted this due to performance limitations. I have an iPhone 5, and found a way to get around this restriction by building a content block

Apple apparently restricted this due to performance limitations. I have an iPhone 5, and found a way to get around this restriction by building a content blocker myself. It's pretty easy, just a list of JSON rules. You can use this project as an example: https://github.com/krishkumar/BlockParty https://github.com/krishkumar/BlockParty I am running my own content blocker on my iPhone 5, and it works nicely. Note however, that webpages do seem to load slower than when a content blocker is not installed (this is why Apple limited it to 64-bit devices)