I can change forwards and backwards between teacher view, demonstration digital camera, viewers view, presentation slide deck or video, etc… and it’s seamless. In a nutshell, it really lets me show off the content material with out requiring expensive technology and having the expertise control what can happen. This could additionally be manually corrected, nevertheless, in Logitech’s straightforward digicam settings software program, which helps you to administration the colour depth and white balance. What used to take a Tricaster/Video Toaster setup can now be done in software program using a regular PC. I can change backwards and forwards between trainer view, demonstration camera, viewers view, presentation slide deck or video, etc… and it is seamless. I’d additionally wish to avoid using fallback colors in circumstances where they weren’t earlier than .
I was speaking to Sai about this and he instructed I make a comment here — so I have not learn by way of and understood the current state of discussion, apologies. Those are both detectable by way of performance characteristics. Allowing them to be set would not fix the exploit in any helpful way.
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- Anyway, I discover one property of the “limit CSS properties of visited hyperlinks to color etc.” very sketchy, particularly that it abruptly turns into a _security-critical behaviour_ that color not have an effect on measurement or other properties of links.
- In the first case it is a privateness violation, which we normally classify as distinct from safety concern.
- I recognize how Manycams is sort of a mini-production studio.
- Perhaps as quickly as there’s a call to learn a pixel it switches to a double-rendering mode where 2 bitmaps are maintained, and most rendering is copied into both.
- In a nutshell, it really lets me showcase the content material without requiring expensive technology and having the technology control what can happen.
- Even the most experienced amongst us will typically make this error.
I mean, presently we do a _full_ history lookup for EVERY hyperlink within the web page. I do not understand the reason for all of the feedback about how it will change page format, and so on. Also keep in thoughts that those restrictions would solely apply to hyperlinks that time to foreign domains, so any web site can still do whatever it wants together with his personal hyperlinks. This is a extra flexible way, preserving most of the design potentialities for the location designers, while nonetheless letting the person know wich hyperlinks he has gone to. Using this method, a website can interactively search through your historical past and discover pages you’ve got visited that couldn’t be guessed easily (provided they’re public webpages). Property blocking and the loading images from the stylesheet. Worked round by using a “privacy mode” where the worldwide history just isn’t affected.
If the page reads the structure, or does some rendering that is decided by visited state, the actual worth within the construction would not be learn, and it would be spoofed as unvisited. The ultimate stage of including link colour would be after the web page had finished rendering (into non-display memory), so it might be harder to time. I’m unsure if by secure shopping mode you are referring to non-public searching mode or not, but when that is the case, we already try this. Inside personal shopping mode, no hyperlink would be displayed as visited, no matter if the go to has occurred earlier than or after entering the non-public shopping mode.
This does decelerate the attacker, however the attacker can still get personal info from each click on. Let’s say a web web page shows N hyperlinks that each one say “Click here to continue.” The unvisited hyperlinks are styled to blend in with the background so the person can’t see them. The visited links are visible because of the visited link styling, so the person solely see the visited ones. Then the attacker can find out where the consumer’s been by which link they click on. Please, give customers back the power to type visited links’ text-decoration, opacity, cursor and the remainder of css-properties that we might harmlessly spoof. I don’t perceive that take a look at totally, nevertheless it appears to contain accessing an information structure about the web page.
UAs may due to this fact treat all hyperlinks as unvisited links, or implement other measures to protect the consumer’s privateness whereas rendering visited and unvisited links in one other way. I do not thoughts if an attacker can find out whether I’ve visited a given page, one URL at a time, with consumer interaction . But I do need visited link coloring to work on all the blogs I go to, even when I haven’t clicked a given link from that weblog earlier than. Any pixel reads would learn the version in non-screen memory. The norm for the last donkey’s years on every browser has been that visited hyperlinks are all the time proven as visited whether or not or not they’re on the same domain as what you’re presently viewing.
Plus we would spend plenty of time on backporting as a substitute of of working on efficiency or different features. So as I said it’s a query of trade-offs, which are never straightforward. This is why it issues me that there appear to be no plans to backport the fix as far as I was able to find out.
In order to fix the bug that I was setting the mother or father type context incorrectly for the if-visited fashion knowledge for hyperlinks that have been descendants of different links. It’s probably not a bug in Firefox it’s a bug within the HTML spec that should be closed however in the meanwhile this QAD answer works simply fine. Firefox would be the solely browser that might be capable of blocking this exploit then.
NO, I don’t need web pages to have the power to play with visited standing — I can simply think about on-line stores seeing what I’m shopping for from their competition and utilizing that as commercial tracking. Optimistically marking this bug as fastened, though I already know of some followup bugs that must be filed. It’s not alleged to work, since that’s a change within the alpha component of the color. If you believe there’s a bug, may you file it as a separate bug report. It could be good to doc no matter invariants this fashion context satisfies (e.g. the ones we assert in SetStyleIfVisited). I’m going to connect a collection of patches that I believe repair this bug.
This wouldn’t should slow something – the interior code would load the identical method it does now, but some resources would block till they are within the cache. Leaking a couple of bits slowly can leak enough over time to compromise sensitive secrets and techniques. It must be the default, although it breaks the spec, because individuals should not have their privacy violated unless they agree, even if a specification says they need to. If I am on a web site A and I click on a hyperlink to a different website B, it would be good if any hyperlink to B could be seen as “visited” by A. What do you consider limit the visibility of “visited” for a domain A to other domains that have been visited having A as referer? I think it is a bit better that just restricting it to same domain.
I assume the pref added by the patch is helpful for a small fraction of users, and maybe for a larger number of users if security consultants inside or exterior Mozilla explain the difficulty. Here’s a patch for a format.css.visited_links_enabled pref, defaulting to true. In different words, commerce some design possibilities for privateness, while keeping the full performance of exhibiting visited hyperlinks. For each visited URL, make a background request to a server that will fetch a replica of the URL and return an inventory of links on that page. 1) It would nonetheless be attainable for an attacker to construct a convincing phishing web page that looks like Wells Fargo to a Wells Fargo customer and Citibank to a Citibank customer.
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Certainly the most secure path, and the best to implement, but once more, we lose the functionality of understanding whether they are visited or not… Then I assume we have to take a non-CSS strategy to fixing this, corresponding to storing all referring domains to a link in international historical past, and only permitting styling if the web page is in the referring domain. It is true that these proposed adjustments make attacks harder and are prone to work nicely with most websites. Although I help these changes, I wish to point out that they do not repair the entire known exploits.
Another fascinating factor that can be carried out since bug was fixed is to know in actual time when somebody clicks on a link. For instance, you would visit 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 earlier than, that link will immediately become ‘visited’ on the tracking web page.
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