If you have any other questions about using Firefox for OS X 10.5.8, let us know in the comments below. You can use Apple’s Migration Assistant to transfer everything from your old Mac or OS X, including Firefox. Then, choose Firefox from the list of open. If you do decide to upgrade your OS X or Mac, you don’t have to lose all of your Firefox settings and bookmarks. On Mac laptops, the Power button is usually in the right top corner. Officially, you’re also supposed to be running at least OS X 10.6.6 in order to upgrade via the Mac App Store (which OS X 10.5 can’t access) but there is a way to install Lion from a bootable DVD or USB drive. If you’re unsure about your Mac’s specification, go to the Apple icon in the top left corner of our screen and select “About This Mac”. To do this though, your Mac will need to be an Intel Mac with a minimum of Core 2 Duo, i3, i5, i7 or Xeon processor and at least 2 GB of RAM. But overall, the experience is just flawless. You can never complain about a M1's battery life anyway. Safari does a terrible job with Reddit and anything Javascript-ish. It’s also highly likely that Apple will also stop supporting OS X 10.6 Snow Leopard soon too, so our advice is try to upgrade to at least OS X 10.7 Lion. Yup, using the last Firefox version with a MacBook Pro M1 and a Mac mini M1.

An even more compelling reason to upgrade from OS X 10.5 is that since 2009, Apple has stopped supporting Leopard anymore meaning the entire OS is vulnerable to attack and serious stability issues.

Firefox for macbook m1