Maybe, for instance, the antialiaser reveals some delicate dependency from color to measurement, characters of a extra contrasting color having a tiny tiny subpixel difference in width — voila, safety hole. I don’t know, past that enormous numbers of internet sites distinguish visited hyperlinks based mostly on colours. I’m fascinated to see what links I’ve visited, however I do not care about fancy types. A completely different color for visited links is sufficient, and if a page queries the colour it might be advised the unvisited colour, or if the data type permits, it can be advised both colors.
- I mean, at present we do a _full_ history lookup for EVERY link in the web page.
- If I am on an net site A and I click on on a hyperlink to another web site B, it will be nice if any link to B could be seen as “visited” by A.
- In that episode of The Lucy Show the place Lucy and Vivian go to the picture current to see Alain Resnais’ Last Year at Marienbad and set off a craze for Deconstruction all all through America 1962.
- One is displayed, and link color is dependent upon whether or not the hyperlink has been visited.
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Plus we would spend plenty of time on backporting as a substitute of of engaged on performance or other options. So as I mentioned it is a question of trade-offs, that are never straightforward. This is why it concerns me that there appear to be no plans to backport the repair as far as I was capable of finding out.
I suppose the pref added by the patch is helpful for a small fraction of users, and maybe for a larger number of customers if safety specialists inside or outdoors Mozilla explain the difficulty. Here’s a patch for a layout.css.visited_links_enabled pref, defaulting to true. In other phrases, commerce some design possibilities for privacy, whereas keeping the full functionality of exhibiting visited hyperlinks. For every visited URL, make a background request to a server that can fetch a copy of the URL and return a listing of links on that page. 1) It would still be attainable for an attacker to assemble a convincing phishing page that appears like Wells Fargo to a Wells Fargo customer and Citibank to a Citibank buyer.
To break this feature is breaking one of the helpful visible suggestions features of an internet browser. The content on a web page shouldn’t be able to read the actual color of hyperlinks. But then if the reads of individual pixels impact rendering you get a recursive problem and it’d take a huge amount of resources to completely render. 2) It would still be possible for an attacker to learn information about the consumer’s historical past at different websites based mostly on where they click and don’t click on. For example, and attacker may have an enormous hyperlink that says “Click here” and only users with a certain historical past entry would see it and click on it because it blends in with the background otherwise.
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NO, I don’t desire websites to have the flexibility to play with visited status — I can simply think about on-line stores seeing what I’m buying from their competition and using that as commercial tracking. Optimistically marking this bug as mounted, though I already know of some followup bugs that have to be filed. It’s not imagined to work, since that’s a change in the alpha element of the color. If you imagine there is a bug, may you file it as a separate bug report. It could be good to doc whatever invariants this type context satisfies (e.g. the ones we assert in SetStyleIfVisited). I’m going to attach a series of patches that I imagine fix this bug.
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Certainly the safest path, and the easiest to implement, however again, we lose the functionality of knowing whether or not they’re visited or not… Then I suppose we have to take a non-CSS approach to fixing this, such as storing all referring domains to a link in world history, and only permitting styling if the web page is in the referring area. It is true that these proposed changes make attacks tougher and are prone to work properly with most websites. Although I support these changes, I wish to level out that they do not repair the entire identified exploits.
I don’t assume this would necessarily always be the case, though in some circumstances I suspect it would properly be (and notice you shouldn’t contemplate my assertions as authoritative). In the first case it’s a privateness violation, which we usually classify as distinct from safety concern. Sounds such as you need format.css.visited_links_enabled , which has been round for a while . It’s performance-sensitive code, and it could be run at times when it’s inappropriate to name into script. However, if we add assist for pointer-events values that make hit testing depend on pixel transparency, then elementFromPoint might be used to test transparency, and hence shade.
I was speaking to Sai about this and he advised I make a remark here — so I haven’t learn via and understood the current state of dialogue, apologies. Those are both detectable via performance traits. Allowing them to be set would not fix the exploit in any useful method.
Another attention-grabbing factor that could be done since bug was mounted is to know in real time when someone clicks on a link. For instance, you would go to a page that did the kind of tracking described above, then hold it open in a background tab. If I click on a story on slashdot that I’ve not read before, that hyperlink will immediately become ‘visited’ on the monitoring page.
I can swap forwards and backwards between instructor view, demonstration digicam, audience view, presentation slide deck or video, etc… and it is seamless. In a nutshell, it actually lets me showcase the content with out requiring costly know-how and having the know-how control what can happen. This may be manually corrected, nonetheless, in Logitech’s simple digicam settings software program, which lets you administration myfreeca s the color intensity and white balance. What used to take a Tricaster/Video Toaster setup can now be done in software program utilizing a regular PC. I can change back and forth between instructor view, demonstration digital camera, viewers view, presentation slide deck or video, etc… and it is seamless. I’d additionally prefer to avoid using fallback colours in cases the place they weren’t earlier than .
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