They don't work reliably (some things still autoplay), and sometimes they break the media entirely or don't discriminate between things you actually want to autoplay. For example, the one I currently have installed also blocks "gifv" files from autoplaying in the browser, even though there's no play button to click on. Every time I click on a reddit link that turns out to be a gifv file on imgur, it stays frozen on the first frame and I have to click on "view image", manually change the url to "gif", and reload it. As others here have mentioned, they also tend to break youtube in odd ways. It feels like there are a million little annoyances like that. Back in the "flash era", click-to-play was effortless.
FYI the exact wording depends on the browser, but all HTML5 video elements will have that context menu option. And other options like "Copy URL", "Loop", etc. depending on the browser.
Of course some websites like youtube override the context menu event to prevent that from showing.
There is actually no such thing as a gifv "file format". gifv is just a html page with an embedded webm or mp4 file that hides the standard controls and loops automatically.
Yeah that does sound annoying. Have you tried contacting the extension maker? Perhaps they can add that to the list of fixes/features on their next update?
There are some issues that are still prevent using their certificates in production¹. For example this one prevents Windows XP clients (not just IE, but anything that uses system X.509 libraries) from connecting: https://github.com/letsencrypt/letsencrypt/issues/1660.
Still there's WoSign (free for everyone) and StartSSL (free for non-commercial use).
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¹) Only where 3-5% of more obscure clients still matter.
and you're right (if you're getting at what I think you're getting at).
The argument is that expense sharing is compensation, but it is allowed under the FARs in specific circumstance. Difference here being that the combination of holding out on a public website and receiving compensation via expense sharing put it in common carrier land.
Which does seem to make sense under current rules.