Firefox Browser - Firefox 135.0.1

Firefox 135.0.1 delivers Mozilla's flagship Firefox 135.0.1 with enhanced privacy protection and improved tab management for users seeking an alternative to Chrome-based browsers. This open-source browser targets privacy-conscious users and developers who need granular control over their browsing experience.

Built on the Gecko engine, it offers native support for WebExtensions API while maintaining strict separation from Google's data collection ecosystem. The enhanced tracker blocking in this release identifies and blocks over 3,000 known tracking domains automatically, while improved tab management includes vertical tab grouping and session restore across crashes.

Enhanced Privacy Protection

Firefox privacy features set this browser apart from mainstream alternatives. Enhanced Tracking Protection runs by default, blocking social media trackers, cross-site cookies, and cryptomining scripts without requiring manual configuration.

Container tabs isolate different browsing contexts to prevent tracking correlation between sites. Right-click any tab to send it to a specific container for isolated browsing sessions. The built-in password manager generates strong passwords and warns about data breaches through Firefox Monitor integration.

DNS-Over-HTTPS Configuration

Enable DNS-over-HTTPS in Settings > Privacy & Security for encrypted DNS resolution that bypasses ISP monitoring. This feature routes DNS queries through Cloudflare or NextDNS rather than your internet provider's servers. The about:networking page displays real-time DNS queries, active connections, and proxy settings for transparency.

Tab Management and Performance

Vertical Tab Grouping

Firefox tab management introduces vertical tab grouping that works particularly well on widescreen monitors. Tabs organize into collapsible groups with custom labels. Session restore across crashes maintains these groupings and their collapsed states.

Picture-in-Picture mode works with video elements across most streaming sites including YouTube, Netflix, and Twitch. The floating video window stays on top while browsing other tabs or applications.

Developer Tools and Customization

The browser includes thorough developer tools for testing web applications and supports emerging web standards ahead of Chromium-based alternatives. Press F12 to access the inspector, debugger, and network monitor.

Firefox Sync encrypts and synchronizes bookmarks, passwords, and open tabs across devices using your Firefox Account credentials. The bookmark manager supports tags and smart folders for automated organization based on visit frequency or date ranges.

Extension Support

This web browsing platform supports WebExtensions API for compatibility with Chrome extensions while maintaining Mozilla's stricter privacy standards. Firefox extension compatibility covers thousands of add-ons through the official Mozilla repository.

Reader Mode strips away clutter from articles automatically, detecting content blocks and reformatting them with adjustable fonts and spacing. The download manager handles torrent files when paired with external applications like qBittorrent or Transmission.

Installation and Platform Support

Firefox 135.0.1 runs on Windows systems including Windows 10 and 11, plus macOS and Linux distributions. The installer weighs 54MB and completes in under two minutes with default settings.

I drop the installer onto Windows 11, walk through three opt-out screens, and the app launches clean. No bundleware or homepage changes. The open source licensing means no subscription fees or usage restrictions.

Press Ctrl+Shift+T multiple times to restore recently closed tabs in chronological order. Use Ctrl+Shift+A to access add-on preferences quickly without managing through menu hierarchies.

The about:memory page reveals detailed RAM usage per tab and extension for troubleshooting performance issues. This proves essential when identifying memory leaks from specific websites or poorly coded extensions.

Mozilla's firefox browser maintains its position as the primary alternative to Google's Chrome ecosystem, offering genuine privacy protection rather than marketing promises. Regular security updates arrive every four to six weeks, with critical patches deployed within days when necessary.