I downloaded Mozilla Firefox a month or two back, and have been able to make a few observations about how it interacts with Blogger compared to IE. This may not be the same for you, but the realizations I have made have helped me work out a few problems.
1. When I post using Mozilla, Blogger will not display the "comments" function
Once I got Mozilla, I started using it with Blogger because I liked the navigation tabs, which helped me to avoid shutting Blogger down accidentally and losing whole posts or parts of posts that I hadn't saved as drafts yet. (Sound familiar to anyone?)
However, around the same time, I realized that some of my posts were not coming up with comments enabled. This was most annoying and I had never had that problem before, but didn't immediately make the Mozilla connection. Out of habit, I was still doing some posts on IE, so it was not a constant problem.
The other day though, I posted using Mozilla, saw that the comments weren't enabled, and immediately reposted using IE. Presto, change-o: the comment function was there.
2. With Mozilla, I can cut and paste my photos on Blogger.
Posting multiple photos was very complicated for me with Blogger and IE because the cut and paste function would not work, and also photos were always automatically loaded to the top of the page (this may still be the case.) So I had to pre-plan the order of my photos, load them in the correct sequence, and write my text around them.
With Mozilla, I can move my photos around and cut and paste them -- a big time-saver for me.
3. In conclusion:
I now write my posts on Mozilla for the tabs and photo possibilities, save them as drafts, then do the final post on IE!
Kind of complicated, but I hope this information might be useful to someone. Mimi, for example, has mentioned to me that she was having some comment enabling problems with Blogger. Maybe I've found the solution!