The Best of All Time Rated 5 out of 5 stars

If you're considering using Stylish, do yourself a favor and just hit Add to Firefox right now.
I've used it for many years, it's my most used add-on, and my favorite.

Stylish was essential when I was learning CSS and it still is for learning new additions. It would have been more difficult and time consuming to understand and experiment with CSS if Stylish hadn't been around.
It has been a big help with developing some of the add-ons that I've made.
It has allowed to remove annoyances and distractions from websites.
It has allowed me to customize Firefox the way that I like and that best suits my needs. I have poor eyesight and being able to change colors, images, icons and sizes, fonts and anything else has made using Firefox itself more enjoyable and usable (Mozilla Thunderbird too).
I've used, and continue to use Stylish while working on my websites, and customizing WordPress themes.
Stylish may even be able to cook me breakfast, I just haven't tried it yet.

Firefox developer tools has nothing that compares or that is more comfortable and easy to use as Stylish and I'll be sticking with it.

I'm surprised and a little embarrassed that I've never left a review. Perhaps I did years ago, but I'm ok with writing a new one because you Jason, deserve praise and kudos for Stylish itself, for maintaining it for all of these years, and for putting up with that crap that you went through when developers were being called out about memory usage.

Thanks sincerely.
You rock!

@riveter change the size to whatever you want.
#stylish .textbox-textarea {
font-size: 1.4em !important;
}

This review is for a previous version of the add-on (1.3.2.1-signed).