However, as with any traffic controls they're useless if they're not actually enforced. Which is a shame, because it'd be absolutely trivial to automate that detection with cameras.

I'm also rather sceptical of things that "sanitise" HTML, both because there's a long history of them having holes, and because it's not immediately clear what that means, and what exactly is considered "safe".

This sort of thing should also help put the "adblocking is unethical" argument to bed.

7p cheaper for 10 minutes works out at about minimum wage if you're buying 30 litres, but with a bigger car you could easily be buying twice that, which works out much better.

Although of course you also need to factor in how much fuel you burn driving to the cheaper place, and the extra wear and depreciation on the car. If you take the HMRC standard rate of 45p/mile (which was meant to cover all of that kind of thing, but hasn't been updated for years) then even going a few miles out of your way quickly ends up costing more than it's likely to save.

But it's still useful to know about price variation so that you can plan ahead. I regularly drive past several different petrol stations, and if I know that one of them is usually cheaper or usually more expensive then I choose to use or avoid it, or to decide that I'll fill up tomorrow when I'm going that way rather than today at a more expensive one.

And that'd be more useful built into satnav, so that if I know I have to fill up somewhere along my route then I can pick the cheapest place, since there's no real time cost to any of the options compared to each other.

Denied.

> Eight titles were excluded from the analysis due to them being either shorter than the other full-length novels (Eric, 1990; The Last Hero, 2001), or because they are part of his titles for younger readers (The Amazing Maurice and His Educated Rodents, 2001; The Wee Free Men, 2003; A Hat Full of Sky, 2004; Wintersmith, 2006; I Shall Wear Midnight, 2010; The Shepherds Crown, 2015).

Open source is a bare minimum, although even that's not worth as much given how much harder it is now to load extensions that you've compiled yourself.

But those features you're talking about sound like they need extensive privileges within the browser. And while your extension might do what it says today, what's stopping you sticking a load of malware and adverts in there tomorrow? Or selling it to someone else who does?

If the author is an established person whose been known for years to develop good quality extensions and not sell out, then that gives some assurance. If it's an organisation like the EFF, even better?

But a random anonymous person making their first extension? No chance.

If you're trying to protect your own website and servers, those markets won't be a concern for you. If you ship a widely used product that's an attractive target (like web browser, mobile device, network kit, etc) then they definitely are.

If you tried to submit it would spend a while with a really slow progress bar, and then say it failed to submit and asked you to contact SETI directly. I wonder if anyone actually did....