iOS supports third-party browsers, but not like you might expect. Third-party browsers will always be inferior to Apple’s own Safari on iPhone and iPad — at least until Apple relaxes their restrictions.
This is the reason why Mozilla no longer offers their Firefox Home app for iOS, and it’s the same reason why Google’s Chrome developers had an internal debate before releasing the current Chrome app in the App Store.
This means that web browsers can’t implement their own rendering engines; they must embed a version of Safari’s rendering engine. They can’t offer a faster rendering engine or new web features. In effect, each third-party browser on iOS is a different interface around Safari.
On traditional desktop operating systems, like Windows, Mac OS X, and Linux, each browser can provide its own rendering engine. This is why Mozilla Firefox was so much better than Internet Explorer 6, and why Google Chrome was so much faster than Mozilla Firefox 3.0. Each browser developer could create its own optimized rendering engine. If Mozilla Firefox was forced to render websites with Internet Explorer 6’s rendering engine, Firefox would never have taken off and we might still be stuck with Internet Explorer 6 today — Microsoft only resumed development on Internet Explorer after Mozilla Firefox took off.
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In effect, all third-party browsers aren’t just different versions of Safari — they’re all basically just slower versions of Safari.
Sure, a browser manufacturer could theoretically create a special version of their browser that only ran on jailbroken devices and distribute it outside the App Store, but they won’t. They’d be appealing to a limited market of jailbreakers that Apple is trying to stamp out.
Apple’s iOS also doesn’t let you select your default applications, so third-party browsers can never be your default browser. Even if you prefer Chrome, tapping a link in most other applications will still open Safari. You’d have to copy-paste the link from Safari into Chrome to view the page in Chrome instead.
Application developers are allowed to have their apps open other apps, so there is a way to sort-of make another browser your default. Every app has to hard-code a list of alternate browsers it supports and provide a way to choose between them. A user will have to select their default browser in each app individually, and they’re out-of-luck if they prefer a browser that the app’s developer hasn’t included.
The same app store policy means that third-party browsers can’t offer support for browser add-ons. Do you use LastPass to store your passwords? You’ll have to use the LastPass app, which implements its own internal browser — you can’t just install a LastPass add-on for Safari or Chrome. Of course, LastPass’s internal browser is also forced to be slower than Safari.
Add-ons are possible on other platform, even if they’re not available in every browser. For example, Chrome for Android doesn’t support add-ons because Google doesn’t want it to. That’s fine because Firefox for Android does support add-ons. You can install a LastPass add-on and use your preferred password manager in the Firefox app itself, if you prefer. You have a choice.
Third-party browsers will never be faster than Safari — they’ll always be slower. They’ll also always be more inconvenient to use as they can never be your default.
Browsers try to make up for these limitations by adding other features. For example, Chrome’s prefetching and data compression features attempt to help speed things up. Chrome’s real advantage is that it allows you to sync your bookmarks, open tabs, and other browsing data with the desktop version of Chrome — this is the same reason why Mozilla originally provided Firefox Home, as it allowed Firefox users to access their Firefox browsing data on iOS. Mozilla now says they won’t offer Firefox for iOS until Apple stops crippling third-party browsers.
Unless you want the integration features or other unique options a third-party browser offers, you’re better off sticking with Safari. Apple has designed its operating system so that it will always be the fastest and most convenient option available to you.
There’s some hope for change here. Apple once rejected apps for “duplicating functionality” of a built-in app, but they eventually relented and allowed competition. If they never changed this policy, applications like Pandora, Kindle, Gmail, and many other popular applications would never be allowed in the App Store, as they compete with Apple’s own apps like iTunes Radio, iBooks, and Mail. Competition and application choice made iOS a more powerful and flexible platform, and browser choice could make it more powerful and flexible yet.
Image Credit: Kārlis Dambrāns on Flickr