At the rate we're going, most websites will never be easily navigated by blind people. How do I know? Easy ...
My eyesight isn't as great as it was when I was younger. So I like to set my "Minimum font size" in Firefox to 18 pt. (Yes I know they're not technically considered "points" any more). That single simple change fucks up a lot of the web! Just that, nothing more. And it's something that any web designer could trivially test for.
And yet they don't bother! Why? Probably because they're mostly self-centered 20-something hipster douchebags, who can't even imagine there's someone with worse eyesight than they have. Or maybe their sense of "aesthetics" trumps any consideration of "accessibility". In other words: "Fuck off if you're too old to comfortably read 10 pt type. We don't need your kind on our website".
Worse, there are a few sites, such as Bloomberg, that somehow manage to trick Firefox into not rendering their fonts at a minimum 18 pt, but instead render substantially smaller. That's right, some hipster web designer at Bloomberg went out of his way to make sure the text displayed is small. He's probably quite proud of this.
Firefox does works OK on 99% of the web in terms of font size. Unfortunately, stuff breaks in other ways. E.g. when a large minimum font is selected, text often simply disappears off to the right of a page. So then a search box is just not displayed at all, because it's off to the right of the page. Or text just disappears off the bottom of a block. Probably something to do with fixed widths, I don't know I'm not an HTML guy.
Chrome apparently has a large contingent of hipster douchebags working on it. Apparently the concept of "18 pt" is too technical for their genius IQ brains. So they just have simpler font size selections such as Small, Medium, and Large. Unfortunately not granular enough when compared to Safari or Firefox. And Chrome is also far worse than Firefox in displaying pages in tiny type, even when Font size is set to Large.
Still, lots of sites do it right. E.g. Hacker News is no problem. A very simple layout and very readable. (Now if they would only fix that expired link problem).
I repeat, I'm bitching about something that is trivial, a mere inconvenience, compared to what the blind encounter. And yet I run into many web sites and browsers that can't even get that little bit right. So what hope is there for the blind? No nope, none at all!