I just want to point out that if the internet browser is forcibly downgraded, it will only boot successfully after running CFW. For example, if a person updates to the 5.5.2 browser version and then tries to downgrade to the 5.5.1 browser, then he or she will need to run Haxchi or CBHC each time he or she wants to run the browser.
In other words, downgrading the browser is useless.