In the latest Orion RC version I keep encountering JavaScript (or CSS?) issues; I cannot remember that I experienced any of these in former versions, although they occur on web pages I visit regularly.
Here is an example (https://www.mactechnews.de/news/article/Vor-10-Jahren-Der-Mac-Pro-in-Tonnenform-als-gescheitertes-Produkt-183841.html#comments) from an open access Mac forum which allows upvotes and downvotes of comments, but only displays the sum of these votes; you have to hover the mouse cursor over the thumbs up and thumbs down icons to see the discrete up and down values. Here is Safari, where this works as expected (and like it did work in Orion as well):
Here is the current Orion version, where simply nothing happens:
There are similar issues which unfortunately occur behind paywalls, but which I assume are related because they failed in the same Orion version. These are often panels (logins, warnings, …) laid over the regular web page content (which is darkened) and which you cannot get rid of. There is a Close button or something similar, but they have no effect, so you’re stuck. If I encounter this variant on an openly accessible web page, I will add it here.
Version 0.99.126.3-rc (WebKit 618.1.2)
Mojave (10.14)