When comparing Mozilla Firefox vs Brave, the Slant community recommends Mozilla Firefox for most people. In the question“What are the best desktop web browsers?” Mozilla Firefox is ranked 3rd while Brave is ranked 9th. The most important reason people chose Mozilla Firefox is:
Firefox [scores strongly on HTML5 feature support](http://html5test.com/results/desktop.html). Though not as strongly as Chromium/Chrome browsers do.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Strong HTML5 feature support
Firefox scores strongly on HTML5 feature support.
Though not as strongly as Chromium/Chrome browsers do.
Pro Syncs between devices
Firefox Sync is an optional feature in Firefox that allows syncing bookmarks, passwords, and add-ons between devices.
Pro Free, open source and community driven
Firefox is available as a free download. All Mozilla software is licensed under the Mozilla Public License. Instructions on how to obtain the source code can be found here.
Pro Respects your privacy
Mozilla is one of the first browsers that advocates privacy. They believe that internet should be in the user's control and not those who run the websites, and so they give tools inside the browser to make the user be more in control.
Pro Strong developer tool
The built-in developer tools have been merged with the popular FireBug extension since FF57.
Pro High performance
The Firefox Quantum update (FF57) greatly increases the render speed and general performance of the browser, by taking better advantage of the user's hardware.
Pro Reader View
Reader View in Firefox allows users to read an article without any distractions by removing ads, unrelated elements and other distractive objects (similar to Microsoft Edge's Reading Mode and Safari's reader mode).
Pro One of the few browsers not using Chrome's Blink engine
Firefox uses its own rendering engine (called Gecko), instead of Google-controlled Blink like the vast majority of other browsers.
Pro Fast
With new integrations focused on security and performance, Firefox is faster and less likely to have problems during use than ever before.
Pro Open Source
Open Source means that you can see the source code. So everybody even if they don't work for Mozilla is able to look what the browser does in the background. So you can be 100% sure that Firefox doesn't have hidden "spy features" unlike Google Chrome.

Pro Good font rasterizing
Font rasterizing on Windows is much better than in competitors. Even smaller text is clear and contrast.
Pro Automatically updated
Firefox is automatically updated on the platforms where it makes sense.
Pro Uses less resources
Firefox 57 (Quantum) and newer uses less resources than ever. It is proven with benchmark done by AppleInsider.
Pro Dark theme
Beyond the toolbar and tabs, it darkens UI elements such as the URL-bar, pop-downs, new-tab page and more.
Pro Awesome customizability
Great library of add-ons.
Pro Tagging bookmarks
Firefox is one of the few browsers that you can tag your bookmarks. You can view a list of tags and can search your bookmarks in the address bar with tags.
Pro Really independent browser
It's not dependent on Google.
Pro Screenshot tool
Powerful screenshot tool built right into the browser.

Pro Ethical and pragmatic company mission
The Mozilla Manifesto outlines the company's mission and principles. Paraphrasing, they want the Internet to be a free and open resource, and to enable individuals to get the best use of that resource. They do this by creating open source software to which anyone may contribute, so long as such contributions fit with their principles (both ethical and technical).
Pro A lot of add-ons
An enormous number of add-ons.
Pro Fast bookmark management
In order to add an open page to the bookmark bar, the tab can be dragged down and is added immediately.
Pro Built-in privacy protection
Blocks tracking cookies, finger print scanners and Cryptominers by default. Can be changed to the user's individual needs.
Pro Lower memory fingerprint than competitors
Firefox used to be a trailer in memory usage, but as of 2017 it's less hungry for memory than competitors like Edge, Chrome, Safari and Opera.
Pro Text-to-speech (with adjustable speed) without add-ons
Firefox Reader Mode includes Narrate, a feature that adds text-to-speech functionality to the browser.
Pro Very secure
Pro Firefox experiments
FF experiments are Mozilla projects available from FF Test Pilot, such as Firefox Colour, witch lets you customise your browser theme to your liking!
Pro Firefox Lockwise password management
Helps store your usernames and passwords. Lockwise also lets you know if any of the sites you have login details for have had their (and potentially your) data leaked!
Pro HTML5 video preload
The only web browser that only preloads entire HTML5 video which is useful for slow internet.
Pro Mobile
Firefox has a solid mobile app.
Pro Integration with Pocket
Firefox comes with built-in Pocket integration that can allow users to quickly save the article for a read it later function to easily find any articles saved in Pocket from various sources and devices.
Pro Installed by default on many Linux distributions
Many Linux distributions come preinstalled with Mozilla Firefox
Pro About:config
Master about:config and uBlock Origin, and all Firefox-based browsers will be yours.
Pro WebRender
The newer versions of it will soon use WebRender to render webpages, which'll make it much more efficient by utilizing GPU to paint webpages.
Pro UI
UI is better than any other chromium-based browser.
Pro Free/libre software
Released to the community under the Mozilla Public License (MPL), this software respect the FSF's four freedoms, including the freedom to use, modify, and redistribute with or without modification freely.
Pro Option to disable additional privacy concerns
Like fingerprint tracking.
Pro Takes care of privacy and security
Takes privacy seriously by blocking ads and trackers and not tracking people's searches. Things like HTTPS everywhere and no tracking are standard with Brave. In most other browsers, things like these are optional at best.
Pro Built-in adblocking
Other apps make it difficult to block ads without rooting your phone or going through unoptimized add-on stores, but Link Bubble blocks them out of the box, making browsing much less crowded. Contains an optional "Allow Brave Acceptable Ads" So you can support the site you truly enjoy.
Pro Optional feature for you to get reimbursed for viewing ads
Basic Attention Token; you can decide to opt into a new blockchain-based digital advertising system, giving publishers a better deal and users a share of the ad revenue for their attention.
Pro Now supports Chrome Webstore
It's now a faster, less intrusive Chrome.
Pro Tor is available right in the browser
Private Window with Tor hides your IP address from the sites you visit.
Pro Faster than Google Chrome
Brave consistently beats Chrome in speed, might have to do with less tracking being run in the background.
Pro Very fast
The fastest browser out there.
Pro Sync is now available
Option to synchronize data between devices using peer-to-peer connections. No sign-in required, only a sync code.
Pro Option to pay supported sites based on view time percentage
Set up automatic micro-donations. Brave will automatically divide a monthly donation among the top sites you visit.
And/or, you can decide which sites get what percentage of your donation. It’s called pinning.
Pro Supports the latest technologies
Brave regularly adds new functionalities like decentralized domain support and a native crypto wallet long before Chrome considers them. These features to be disabled in settings.
Pro Developed by creator of Mozilla and Javascript
Pro Cross-platform Web Browser
Brave is available on Windows, Linux, macOS, Android, iOS
Cons
Con Some built-in advertising
With their new "pocket" feature, they offer advertisements built-in.
Con Cannot directly translate page
Unlike Google Chrome, if you visit a website with a different language, you cannot translate it, which is a bad user experience for some.
Con Lack of keyboard shortcuts customization
Keyboard shortcuts can not be changed in a user-friendly way.
It is also difficult to manipulate addons with hotkeys.
Con When you search in a website (Ctrl + F) there are no marks appearing in the right scrollbar
All Chromium based browsers have this feature.
Con Installs Addons with updates
Mozilla is installing/integrating addons with every update like the Mr. Robot promotion - it also has integrated Pocket that spams you every time you open the browser or a new tab with partners of Pocket.
Con Uses Google as its default search engine
Which is pretty ironic for a browser that's focused on "privacy".
Con Sometimes very buggy and slow
On sites like twitch.tv chat scrolling is still not fixed. Compared to other browsers Firefox is still very slow and feels sluggish.
Con Uses GTK on Linux/BSD
This makes the integration on non-GTK Desktop Environments very hard.
Con Multi Profile is not user friendly
Multi profile requires commandline -no remote to use and open about:profiles to create manually (on Chrome, you can instantly create them on right top user button).
Con Antivirus has False positives
All Downloads in Firefox are scanned for viruses, but there are a lot of false positives.
Con Doesn’t support multiple languages for spell check
If you write in multiple languages, you need to manually switch the spell check language.
Con Terrible user interface
Con Crappy license
Cannot redistribute binary after source code modification.
Con Major updates may break any installed add-ons
Con Now forces install and use of snap
Only on Ubuntu
Con New icon looks ugly
Con GTK Themes styles the HTML forms
If you're in Linux and you use a dark GTK theme that uses white text and come to a webpage that forces black text on html-forms buttons you will get black buttons with unreadable black text.
Con Doesn't care for its original guidelines/goals
Mozilla originally aimed to be the "good guys" with user choice and privacy in mind. Their current leadership cannot be trusted to hold those goals in high regard:
1) Added Pocket - a privacy data sensitive plugin, made it mandatory
2) Tried to sneak in advertisement as "drive-by hack", backpedaled unconvincingly once users complained
3) Tried to randomly inject a small percentage of Firefox downloads in Germany with a data collecting plugin (Cliqz) that tech-savy Germans consider adware (no opt-out question asked).
Con It's a memory hog even though Mozilla claims it is not
Mozilla claims it's using 30% less RAM than Chrome but in real life tests it uses much more.
Con Brave is an Ad company
Brave Software is a for-profit company (though users must opt into Brave ads and Brave doesn't track users.)
Con Download package is very large considering it as a browser
Brave takes on a lot of roles besides just browsing so it is understandably a larger file.
Con Useless built-in 'ad blocker'
Its adblocker is useless to be honest. Since the extension uBlock Origin is a great blocker by itself, the Brave ad blocker does not block every ad!
Con Quite intrusive advertisements, especially on Windows
Advertisements keep popping up in the Windows notification center. Must opt in to ad system, but no option to disable sound for ad notifications only.
Con Still dependent on Google
Since it's based on Chrome.
Con Uses much RAM
1 tab, 400+ RAM, also it depends on what website you're on.
Con Same security-holes as Chrome
On the desktop: Brave uses the same browser engine as Chrome, meaning it has the same security-holes as Chrome. Chrome is a big target for hackers (being the most popular browser in the world), and a webpage that will hack Chrome may also hack Brave.
However, Brave has security features that Chrome doesn't (such as a built-in adblocker). Those features will stop many hacking attempts.
Con Doesn't remove search engine ads
Con No reader view
Can be accessed with an extension though.
Con Dumbed down in the latest versions
In previous versions, Brave felt more like Firefox. Now it's been dumbed down, it feels more like Chrome/Chromium. For example: There's no menu-bar.
Con The iPhone version has some odd behavior
On reopening Brave, it often returns you to the "search results" page, rather than the webpage you had previously browsed to from the search results page. Might just be a specific configuration.
Con Cache dump
Doesn't clear cache well, shows same page even after emptying it until you ctrl+F5 to get fresh page every time you visit the page(s).
Con A browser for NFT-ers(?)
There would be less of a problem with using Web3 solutions if they weren't sometimes looking like an art for art's sake, a jerkcircle shoving down it's own topic down the users' throat. Replacing the Web 2.0 with another commercial solution is bound to end up as a reinvention of the wheel, where even more commercialization and direct monetization will push digital exclusion. Non-profit open source community has achieved great things while so far NFTs and cryptos are, not without a reason, ridiculed.
Con Sync issues
Unable to sync extensions, no cloud sync (only device sync).
Con Appearance
No options to customize apperance, and make the bookmarks appear on the home page, for instance.
Con Creator support limited
Most creators don't use it and so will not profit from the crypto system.
Con Poor Customer Support
Only customer support available in Brave community. Mods usually does not help.
Con Promotes search engines that track users such as Bing and Google
Google Search is the first search engine on the list.
Con Bookmark management
Bookmark management is not as seamless as other browsers.
Con No cloud sync like Firefox
Con Power hungry, uses much more battery power than other browsers
Per default Brave enables hardware acceleration which results in a much higher energy (battery) consumption than the most other web browsers.
Con Hypocritical/deceptive stance on privacy and advertisement
Brave is advertised as a browser that respects your privacy and blocks ads while still supporting content creators. However, at the same time the company is making deals with Facebook, Twitter and others to whitelist their trackers and ads
Con Bookmark button located on the left side of the URL bar and can't be moved
