Browser extensions are fantastic but, as superheroes have taught us, with great power comes great responsibility. Malicious developers can hide bad behaviour inside useful extensions and when they slip through the screening process, the only option left to the likes of Mozilla and Google is to ban them. Mozilla has updated its blocked add-on list and it includes an extension the company itself gave the thumbs-up just this week.

If you've stumbled across an image on the internet — perhaps on your favourite social media site — and you want to know more about it, you can always ask the person responsible for the post. Odds are good that they probably just cribbed the image from somewhere else and don't know any more about where it came from. But that's fine. You can also take on the detective work yourself and there are plenty of resources to help you out.

Do you ever feel that the web is breaking? When shopping online for a toaster, you can expect an ad for that thing to stalk you from site to site. If you have just a few web browser tabs open, your laptop battery drains rapidly. And don't get me started on those videos that automatically play when you're scrolling through a webpage.

Say a webpage isn’t loading right. Maybe it’s collapsed from too much traffic after going viral on Reddit. Maybe it’s blocked in your country thanks to a law like GDPR. Maybe it was recently deleted. Usually Google has a saved copy of that page. And the quickest way to get that saved copy is to type cache: in the address bar.

Every week at Lifehacker, we highlight the best new apps and browser extensions that can do something awesome for your devices (or life). If you took an Internet-free sabbatical or went on vacation for a week, you probably missed some gems.

Windows: When Microsoft debuted its new “Timeline” feature in the Windows 10 April 2018 update, I was a bit bummed to find that this feature — which you can use to see what you were up to on any given day — isn’t very helpful unless you’re using the Edge browser.

One of the more annoying aspects of watching Netflix on your laptop or desktop computer is the trailers the service likes to automatically play on your behalf. Thankfully, there's a neat extension for Chrome and Firefox that fixes this issue - and a bunch more besides.

As I mentioned earlier today, Mozilla rolled out two new apps the other day as part of its Test Pilot program: One for syncing passwords between your Firefox browser and your iOS device (and soon, Android), and another app (and extension) for synchronising notes between your Firefox browser and an Android device.

iOS: There are plenty of incredible password managers out there — 1Password and LastPass come to mind — but Mozilla has password-management aspirations of its own. The company just released two new new mobile apps as part of its Test Pilot program and one, Firefox Lockbox, is a pretty convenient way to pull up your passwords on your iPhone and iPad.

My web browser of choice is Google Chrome, but I'm always on the hunt for a better browser. After all, it's the app I use most often on pretty much any computer. If a browser can perform faster and more efficiently than Chrome, I'd absolutely consider it. So I decided to give Firefox a try.

Chrome, Firefox: It's been a rough week for many of us and it's likely you're a little stressed out right now.

We all rely on web browsers to get us through the day, so a serious problem with your browser of choice can have a serious impact on productivity, or peace of mind, or Netflix binge watches. Here are some of the most common problems you might come across in your browser, and what you should do to fix them.

Firefox says they are testing a new feature that will allow you to easily check if your email address has been involved in a data breach and provide recommendations on what to do to protect your personal data. The new feature, which has a strong Australian connection, will initially be deployed to 250,000 users, most of whom will be from the United States, before becoming widely available.

Chrome/Firefox: There are plenty of reasons you might not want to give out your real email address when signing up for a site or service. Maybe you're really big on privacy; or, more likely, you just hate spam, and figure the fewer places that know your real email address, the better.

It was a little over two years ago that Chrome snatched the market share top spot from Internet Explorer. Now, in 2018, Chrome sits at a whopping 62.85 per cent, while IE and Firefox wallow at 11.82 and 9.92 respectively, according to the latest figures from Net Marketshare.

Firefox unveiled a handful of new features this week via its Test Pilot program, and two caught our eye: A new Side View that allows you to view two sites within the same window side-by-side, and Firefox Color, a feature that allows you to aggressively customise your browser's colours.

How many times have you gone to share an interesting story (or comic) with a friend — a pretty standard process — only to find that the short URL you thought you were copying and pasting is actually one giant, messy paragraph of text. You can thank all the services and sites that append a ton of extra junk to URLs so they can have a better understanding of how you visited the site, what you've looked at and where you're going.

Browser cookies are useful in some instances; unpleasant in others. While they can save you from having to go through a complicated authentication process whenever you're trying to access your favourite sites, they can also store data on what you've done on a particular website -- which can then be used to serve you more "relevant" advertising at a future point.

Firefox has started rolling out two-factor authentication, and if you use the browser to store any passwords you should enable it now.