Maybe a bit of an edge use case, but I use the translate page feature a lot in browsers. In Chrome you can switch back and forth between languages seamlessly, but in Safari translating a page requires reloading the page - which can cause issues on forms that use POST. Even worse, I've found that switching back to the original language often just doesn't work on pages loaded with POST - the page gets stuck on the translated version (which can sometimes cause issues with some poorly designed javascript components like calendar widgets) even after reloading the page. This causes issues frequently enough to prevent me from switching to Safari.

On the plus side, though, Safari will also translate text in images.