If you've upgraded to Apple's iOS 9, and found that a load of stuff you want to look at online is suddenly blocked (hey, we're not here to judge you, okay?), there's a really easy way of getting around it, so you can fill you boots with whatever you like.
Apple's content blockers are enabled or disabled through the Safari section of Settings, as you'd imagine, but if you only want to do it temporarily, and quickly while looking at something you wouldn't normally get stuck into, then there's a nice shortcut you can employ.
If you tap and hold on the reload button in Safari, it will give you an option to 'Reload Without Content Blockers', which means you can quickly look at a page as the developers of the page intended. With this method, there's also an option to look at the desktop version of the site, if that's your thing (you might want to hit a 'submit' button on Tumblr, which isn't available on the mobile app, or whatever).
Either way, it is as easy as that. If you want to turn off content blocking completely, then go into your settings and mess around in there.