Look at the Audience display, in Stats. How many different entries do you see, in "Pageviews by Browser" and "Pageviews by Operating System"? Stats lists are limited to 10 entries, each. Do you ever wonder if those lists, like the other Stats lists, should be longer? How do we ever hope to observe our blogs, and see what they look like, for our many different readers?
One of the challenges of publishing a Blogger blog is developing a blog that looks good, on every reader's browser and computer. The number of combinations of operating system times browser brand times browser version - any of which can create a display oddity, when viewing any blog or website - is staggering.
How can we ever hope to produce a blog that's universally readable? We can always (depending upon the capacity of the computer(s) which we may use) use different browsers, to monitor ongoing issues which might affect our blog's legibility. Knowing the real number of combinations that may affect our readers, will using one or two alternate browsers (on one single operating system) really accomplish much?
One way that we can keep some running idea what our blogs look like, in different browsers, is to use an online browser display analysis service. This is an essential part of verifying proper formatting, as we make changes.
Free online services, like AnyBrowser or BrowserShots, will show you what your blog looks like, by simulating it on different browsers. Their displays, on your browser and your computer are obviously subject to peculiarities of your browser and computer, of course - but their services are a good start.
For in depth research, the W3Schools Online Web Tutorials will identify, in detail, which features are supported, in different browsers.