Summary
Highlights
Brave, marketed as a privacy-focused browser with 80 million users, performed well in privacy benchmarks. However, despite being opt-in, its Brave Ads advertising infrastructure made connections during idle startup on a fresh installation, contradicting its privacy-centric messaging. While better than many, this discrepancy highlights a gap between marketing and practical network behavior.
Firefox, often recommended for privacy, revealed surprising findings. On a fresh install, it connected to Google servers for Safe Browsing by default, undermining its non-Google appeal. It also transmitted telemetry data to Mozilla and made connections to Pocket, a third-party service, without user authorization. While Firefox offers strong privacy features when configured manually (e.g., total cookie protection, uBlock Origin support), its default settings fall short of its privacy reputation, creating a misleading impression for average users.
DuckDuckGo, built on a privacy-first brand, showed connections to Microsoft Bing infrastructure during idle startup. This is despite their transparency about using Bing for search. More concerning was the discovery in 2022 that DuckDuckGo contractually allowed certain Microsoft tracking scripts while blocking others, a policy since updated but with some carve-outs remaining. While offering genuine privacy protections in many areas (tracker blocking, fire button), its Microsoft dependency reveals a partial rather than comprehensive privacy offering, not adequately highlighted in its marketing.
Opera, heavily marketed with privacy features like a built-in VPN and ad blocker, was found to be the worst performer. Within 60 seconds of idle startup, it connected to advertising measurement platforms and behavioral analytics infrastructure, transmitting hardware fingerprinting data. Furthermore, Opera's acquisition by a Chinese consortium (Kunlun Tech) with affiliated predatory loan apps raises concerns about data handling. Its built-in VPN was identified as a proxy service routing traffic through Opera's own servers, not a true privacy VPN. This significant gap between aggressive privacy marketing and technical reality makes Opera a highly problematic choice for privacy-conscious users.
LibreWolf, a community-maintained Firefox-based browser, was the only one that aligned its privacy claims with actual network behavior. It ships with all telemetry disabled, Pocket integration removed, Google Safe Browsing replaced, and strong tracking/fingerprinting protections enabled by default. Network captures showed only update checks to its own servers, fulfilling the implicit promise of being secure and private. While it has trade-offs (potential website breakage, smaller community, no sync feature), LibreWolf offers genuine, out-of-the-box privacy for users prioritizing technical reality over marketing hype.
The video concludes with specific recommendations: Brave users should disable Brave Rewards and enable aggressive shield settings. Firefox users should install uBlock Origin, disable all telemetry, Pocket integration, and consider adjusting Safe Browsing and fingerprinting settings. For DuckDuckGo and Opera users, switching to a more private browser like LibreWolf, a properly configured Brave, or Mullvad browser is recommended due to significant discrepancies between marketing and actual behavior. The overarching theme is to verify privacy claims through network captures (using tools like Wireshark) as marketing language is often optimistically framed and does not always reflect technical reality. Users are encouraged to run their own tests to make informed decisions about their browser choices.