Private browsing modes in four biggest browsers often fail


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Features in the four major browsers designed to cloak users' browser history often don't work as billed, according to a research paper that warns that users may get a false sense of security when using the built-in privacy settings.

The private-browsing modes are supposed to allow users to visit a website without leaving any trace on their computers, and yet Internet Explorer, Firefox, Chrome, and Safari frequently leave tracks, according to the research, which is scheduled to be presented at next week's Usenix Security Symposium in Washington DC. The makers of those browsers ? Microsoft, Mozilla, Google, and Apple respectively ? often hail the offerings as a way to enhance privacy when using shared computers.

One failure that affects IE, Firefox, and Safari happens when users save SSL, or secure sockets layer, client certificates while browsing in private mode. The browsers store a record of those actions in a file that allows anyone who has physical access to know exactly what site the user was visiting at the time. Similarly, when IE and Safari encounter a self-signed certificate, it is stored in a certificate vault that is preserved even after the private session ends.

Similarly, Firefox users who make security certificate settings while in private mode will have a partial copy of their browsing history stored in a file called cert8.db, the researchers said.

?We discovered that all these browsers retain the generated key pair even after private browsing ends,? the researchers wrote. ?Again, if the user visits a site that generates an SSL client key pair, the resulting keys will leak the site's identity to the local attacker.?

The study (PDF here) showed each browser failing in specific settings.

The privacy mode in Firefox, for instance, is undermined when a user sets site-specific preferences or uses a variety of Mozilla-sanctioned plug-ins. The open-source browser also stores websites visited that dole out custom protocol handlers based on the HTML5 standard.

For its part, IE's InPrivate mode can be undermined when websites make SMB queries, since the Microsoft browser shares large chunks of code with Windows Explorer.

The researchers also devised a way for webmasters to detect when someone visiting their sites is using the privacy mode. It involves placing an iframe with a unique web address and then ?using JavaScript to check whether a link to that URL was displayed as purple (visited) or blue (unvisited).?

The researchers said that to the best of their knowledge they are the first to demonstrate a way to detect private browsing mode ? but that may not really matter for much longer. The technique appears to use the decade-old browser history attack, which was recently fixed in Safari and will soon be fixed in Firefox. It's only a matter of time before Microsoft and Google follow suit.

Using the technique, they confirmed what we all suspected: the feature is mainly used when surfing to porn sites. Gift and news sites, not so much. ?

http://www.theregister.co.uk/2010/08/06/private_browsing_mode_failure/

I think people put too much trust in these modes, but at the same time I think the browser makers hype it up a bit.

That being said, these would be flaws that should be fixed.

...

The technique appears to use the decade-old browser history attack, which was recently fixed in Safari and will soon be fixed in Firefox.

...

Uh, Mozilla came up and implemented it first, Apple was second.

Well, porn is a multi-billion-dollar business for a reason. But even so, people can't afford to lose the jobs they have over it. Thus, "porn mode" was born.

Porn mode was born because porn is a really booming internet business...and people cannot control their urges. If people feel the need to wack it all the time, they have problems. Friend of mine, her EX had porn on every laptop and mobile device he had....and thats not even the half of it.

But anyway, at work I dont even bother trying to mask where I am going to because I respect the rules.

I've never bothered to use those modes tbh, I guess a better private browsing mode would be running a browser normally in a sandbox, then deleting the sandbox when you close the browser.

You do know that there's a market for VMware vulnerabilities too. I can only imagine that VirtualBox, Virtual PC and the OSX ones are would be similar.

But I agree - I never use these modes since I've never really believed that they can self contain whatever happens. I wonder if these modes lead people to believe that they're protected from malware, tbh.

1195970568513ij6.jpg

That's because you never bothered to upgrade from IE6.

I dont need to, I dont use private browsing anyway.

You do know that there's a market for VMware vulnerabilities too. I can only imagine that VirtualBox, Virtual PC and the OSX ones are would be similar.

I meant something like sandboxie, but I guess there are vulnerabilities there too.

Probably they don't think Opera is a major browser. Hope not. :(

In terms of how much they've innovated and contributed to the browsing community in the past no their not, in terms of market share yes their tiny.

You can't count Chrome or Safari as major browsers if Opera is not. It's been in development far longer and has plenty of commercial ties especially in embedded devices, and was "innovating" far longer than than any other. It uses it's own engine and isn't simply a front-end and has a sizable market share when you consider how many browsers are in use, total. 10's of millions of people at least... 'bout the only thing they don't do a lot of is marketing and bundling which is practically the only way anyone else got their browser in use, 'cept for Firefox...

Most people go by market share to determine what is a major browser. Unfortunate Opera market share is tiny.

Exactly, but so is Safari and Chrome's. It's rare to ever come across someone in the general public that actually uses these as their primary browser. So to include Safari and Chrome is to expand the definition of major browser to including anyone with a single digit of market share, which Opera should be included. The only reason anyone might think Safari and Chrome are otherwise major browsers are because the image their parent company has to the media..

Porn mode was born because porn is a really booming internet business...and people cannot control their urges. If people feel the need to wack it all the time, they have problems. Friend of mine, her EX had porn on every laptop and mobile device he had....and thats not even the half of it.

Well, I don't see the point of having X rated material on mobile devices. Pointless.

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    • Sihoo Doro C300 Pro V2 Ergonomic Office Chair review: The Ikea of chairs by Steven Parker I've reviewed a few gaming chairs over the past three years or so and generally found them to score well in our reviews. SIHOO reached out asking if I was interested in taking a look at their flagship chair, the Doro C300 Pro V2. I never got the chance to check out its predecessor, but the V2 is described as an "Adaptive Ergonomic Chair." It became available to buy in April of this year. Let's get things rolling with a closer look at the specifications and features. Specifications Doro C300 Pro V2 Model Ergonomic Materials Mesh Back and Seat; Soft PU Coated Armrests Height adjustability 45.5 - 53 cm / 17.5" - 20.9" Seat (w+d) 52 x 43 - 47 cm / 20.5" x 16.9" - 18.5" (adjustable) Backrest 52 – 60 cm / 20.5" - 23.6" (adjustable) Lumbar support Mesh built-in (adjustable) Armrest adjustability 8D Bionic Armrests Rocking angle 105°, 120°, 135° (fixed) Neck support Mesh built-in (adjustable) Net weight 27.3 kg / 59.64 lbs Weight support 150 kg / 330 lbs Colors Black, White Warranty 5 years (upon registering) Price $499.99, $539.99 Introduction At first glance, it looks like a chair that in another life wants to be a Herman Miller; It certainly looks like my Aeron Remastered, but the Doro C300 Pro V2 has quite a few more features and costs quite a bit less. SIHOO says that it is made up of a "DynaCore" system that tracks your movement and synchronizes the headrest, backrest, lumbar support, and armrests as you shift, twist, or recline. They also say that the "SyncroFlex Backrest" molds to your spine, which kind of describes how the mesh fabric works in most ergonomic chairs, but anyway. Below are the meat and potatoes measurements for the chair. Here is the same tech sheet, but in inches. Durability I would be remiss to not talk about the various durability testing this chair underwent before coming to market, as this is claimed on the product page. First of all, the chair is BIFMA-, SGS-, and TÜV-certified. As for durability, the tests undergone were: 100,000 Castor cycles tested 120,000 Armrest cycles tested 120,000 Recline cycles tested 120,000 Gas lift cycles tested 60,000 Armrest durability cycles tested 120,000 Rotation cycles tested Nothing about weights testing, though. Now that's all disclosed, now onto my own personal findings. Assembly The Doro C300 Pro V2 came in two large boxes (1) (2), and everything was packed very well, protecting the different parts of the chair. In the box, there is a folded sheet that explains the 12 steps to assemble it; they are: Remove the bottom cover on the aluminum base; Insert the five legs into the aluminum base and use ten screws to fasten them; Insert the castors into the legs; Replace the bottom cover on the bottom of the aluminum base; Place the Class 4 Hydraulics gas cylinder into the aluminum base; Screw the bottom part of the arm rests, taking care of the orientation using two screws on each side; Use three torx screws to fasten the footrest to the bottom of the seat; Fasten the backrest to the seat using four torx bolts; Fasten the armrests to the backrest using four Torx bolts (two on each side), taking care to note the orientation; Place the chair onto the Class 4 Hydraulics gas cylinder; Insert the headrest into the top of the backrest; Use two torx screws to fasten the headrest to the backrest. There's also an online guide you can refer to. Carefully unpacking the two boxes took around 15 minutes because almost everything is wrapped in plastic and protective foam; the chair assembly itself took around an hour. I say in the above assembly steps to take note of the orientation, because it's not obvious which way around the bottom portion of the armrests go, and although there is an L and R on the bottom of the armrests, it also wasn't clear from the instructions which was actually left or right, facing the chair, or in the seated down orientation? Anyway, I ended up putting the bottom portions on the wrong sides, and after securing one of the armrests, I discovered that although it was on the correct side, the armrest base could rotate a full 360°, but not when bolted to the chair, so I had to remove it, rotate it, and then bolt it back on. Truly an Ikea experience! Also, to complicate things further, although all the parts are labeled from A to X (yes, that's 24 parts) unhelpfully, these letters do not appear on the parts themselves or the package with the bolts, screws, and washers. There's also a pair of protective gloves in the box, but I think they were made for much smaller hands than I have. Even my friend, who is 5.1, had difficulty putting them on. Once assembled, I needed to sit down. Anyway, as I said, it looks quite similar to my Herman Miller. And here is the back of it. If you look at the product page and on Amazon, it seems like a lot of thought has gone into the chair itself and what it's capable of, but there is no mention at all about the castors, and this is an area where I think the chair trips up quite quickly. I found it difficult to move the chair in any direction. I asked a friend who came to visit me earlier this week to test my findings, and she said that the wheels were "no good," so it definitely isn't just me. I am 6'2 myself and a big guy, I work from home and gained a few pounds from mostly staying in and the hell away from other people. However, the Doro C300 Pro V2 is rated for up to 150kg (330lbs), which in my case is used well within its max rating. Ergonomics The number of adjustments you can make, right up to setting it in nap mode — which I haven't fully tested yet — is what you'd expect from a premium chair. Yes, you can go up and down (max 7.5 cm adjustment), rock back and forth (with tilt adjustment), and lock the chair between three stages of 105°, 120°, 135°, which is not quite as flat as the AndaSeat I tested at 160°. Some thought has also gone into the "8D" armrests, too, which are cushioned but quite firm; you'll only know it if you press hard into the PU-covered tops, which give about half a centimeter, but it's enough to ensure your skin won't get awkwardly stuck to it in warmer (or sweatier) conditions. It almost feels like plastic and is very easy to keep clean. However, the armrest positions move far too easily, and I am not sure what that "elbow" function is. Maybe it is good for a short person with short arms, anyway, I never used it and kept it flat at all times. There are eight levels of adjustment for the armrests, they are: backwards, forwards, swing left/right, height up and down, tilt, and 360° rotation, which can be handy for desk clearance. As I said, the armrest pads shift far too easily, which could give off an ergonomic vibe, but who wants the armrest sliding when you are shifting weight? The height adjustability does lock into place when lifting and adjusting. Comfort This is ultimately what it boils down to at the end of the day, right? Quite a lot of reviews praise the comfort of this chair, and I don't disagree that the mesh seating is quite comfortable. I am used to the material from my daily Herman Miller. However, the backrest cannot be locked into place, and this is actually a feature; as you shift or recline yourself on the chair, the backrest moves with your body. It took some getting used to. The lumbar gives ample support, but I would have preferred an adjustable one built into the seat base, as this causes the backrest to move up and down at will. Again, as with my previous chair review, this chair is also rated for tall people, but nowhere in the product documentation does it say how tall. Being 6'2 myself, I'm happy to say that the backrest is tall and wide enough, and thought has been given to being able to adjust the neck rest, but as others have mentioned in their reviews, people as tall as 6.2ft is about the limit for the neckrest. Conclusion What I didn't like The footrest is rated for 15kg (33 lbs), which to me seems a bit light, and after looking online, it seems like a chair footrest for adults must be at least twice that rating. In all honesty, they are just hollow metal tubes, so it is not recommended to let a kid sit on them. I also feel like it doesn't really go out far enough for my height, so that kind of puts the dampener on me being able to use it regularly. I'll just have to continue to use my subwoofer as a footrest! I do not like the armrests being able to shift around as easily as they can, and they are a little too forward-positioned in the chair to comfortably sit close to my desk, because even in the lowest height position, they don't allow me to go under the desk like is possible with my Herman Miller. I also feel like this chair could have been delivered partially constructed, especially the armrests on the seat, and why the aluminum base wasn't already pre-constructed (without the castors) is baffling, considering it would have fit in one of the two boxes that way. The instructions also need to be clearer. On the pamphlet, there's an A to X listing (which is also used in the steps), but none of the physical parts use this lettering system! What I did like I'll be honest, I haven't used it for very long, just one week, and seating comfort is subjective after all! Any spills wiped straight off it, the stitching, and the lines look great, not a fray to be seen or stitch out of place. It looks kind of cool, too. My favorite feature of these seats is the nap mode. While you're not lying completely flat, it leans far back enough to make you easily doze off after a heavy gaming or working session. Overall, this chair offers plenty of comfort features. The MSRP does vary quite a bit depending on the region, at £549.99 in the UK, and €580 in Europe, and $599 before tax in the U.S. However, shipping is free, which is a bonus for such a heavy item. Is it worth it, though? At three years' warranty, I think it's a decent deal. Another firm out of Germany sent me a free replacement hydraulic gas spring for a chair that failed after almost four years, so it was well outside its two-year warranty. My advice is to always try, as you might have the same luck I did. If I could fault it at all, it would be the constant shifting of the armrests and backrest. Where to buy Although the footrest variant normally costs $539.99, it has been discounted to $469.99 on the official website in Black or White. In fact, the non-footrest variant is only $40 cheaper. On Amazon, it currently costs more at $499.99 links below. Sihoo Doro C300 Pro V2 for $469.99 (official website) Sihoo Doro C300 Pro V2 for $499.99 at Amazon US SIHOO provided a free sample without any review or pre-approval. Good to know This Amazon link is U.S. specific, and not available in other regions unless specified. We only use first-party seller links (at the time of article publishing); ensure that you purchase from a first-party seller link only. Check out Today's Deals on Amazon | or our recent tech deals. Become a Prime member (for Students or SNAP) via Neowin Get Prime Access - Prime for half price (for qualifying Medicaid, EBT, SNAP) Subscribe to Prime Video, Audible Plus, Music Unlimited or Kindle Unlimited via Neowin As an Amazon Associate, we earn from qualifying purchases.
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    • Price Drop: Save 86% on Microsoft Office 2021 Professional Plus lifetime digital license by Steven Parker Today's highlighted deal comes via our Apps + Software section of the Neowin Deals store, where you can save 86% on a lifetime license to Microsoft Office 2021 for Windows. This bundle is for families and small businesses who want classic Office apps and email. It includes Word, Excel, PowerPoint, Outlook, Teams, and OneNote. A one-time purchase installed on 1 Windows PC for use at home or work. Lifetime license for MS Word, Excel, PowerPoint, Outlook, Teams, & OneNote One-time purchase installed on 1 Windows PC for use at home or work Instant Delivery & Download – access your software license keys and download links instantly Free customer service – only the best support! Microsoft Office Professional 2021 (for Windows) includes: Microsoft Office Word Microsoft Office Excel Microsoft Office PowerPoint Microsoft Office Outlook Microsoft Office Teams Microsoft Office OneNote Microsoft Office Publisher Microsoft Office Access No faffing about with subscriptions, just classic apps that don't expire. Good to Know ONE-TIME PURCHASE INSTALLED ON 1 DEVICE Redemption deadline: redeem your code within 30 days of purchase Access options: desktop Full versions No subscriptions – no monthly/annual fees Version: 2021 Updates included* *Support for this version of Office ends on Oct 13, 2026 A lifetime subscription to Microsoft Office 2021 Professional normally costs $219.99, but this deal can be yours for just $29.97, that's a saving of $190. For full terms, specifications, and license info, click the link below. Get Microsoft Office Professional 2021 for just $29.97, or learn more Although priced in U.S. dollars, this deal is available for digital purchase worldwide. Support queries If you have queries or need support for any of the Neowin Deals, please use the contact form here. Neowin Deals are managed and sold by StackCommerce who represent Neowin on an affiliate basis. Why we post these deals We post these because we earn commission on each sale so as not to rely solely on advertising, which many of our readers block. It all helps toward paying staff reporters, servers and hosting costs. So for those that keep moaning and complaining, be thankful we're still online for you to even do that. Other ways to support Neowin Whitelist Neowin by not blocking our ads Create a free member account to see fewer ads Make a donation to support our day to day running costs Subscribe to Neowin - for $14 a year, or $28 a year for an ad-free experience Disclosure: Neowin benefits from revenue of each sale made through our branded deals site powered by StackCommerce.
    • The only reason I want to know where you from is because if you are not from the U.K, then why should you care what we in the U.K do or don't do? Racist I am not, I am fed up with the amount coming over here and feel they can come over here and think we need to support them. Do you know how much it costs this country to support these people coming over here? Even when we give them a place to live it is not good enough. We had a barge that was being used to house immigrants, oh but that was not good enough. A mate said to me at the time, when he was homeless, he would have been happy to live on the barge, instead of ending up sleeping on a bench on the beach. I am not scared to say what my family heritage is, unlike you who is scared to say where they are from or where they live. Father side U.S, mother side Wales, still have family living in the U.S. A mate who sadly died a few years ago, had a load of people from different races recording in his studio, I got on with all of them. Skin colour don't bother me, where they are from don't bother me. Religion don't bother me as long as they don't push it onto me and it is not crazy stuff. I am not religious. But if you are not living in the U.K, then why should you care if we are in the E.U or not? This the problem, too many people poking their noses into where it don't belong. But you believe what you believe, if you think I am racist, then be it, I really do not care. Just grow a pair
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