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Firefox is the open-source, Mozilla-built browser known for default tracker blocking, deep customization, extensions, and support across Windows, macOS, Linux, Android, and iOS. Aside is a YC-backed agent browser designed to complete real work inside your logged-in accounts, with local memory and an agent password manager. Tabbit offers free multi-model Agent Mode and Skills on Mac and Windows.
Opens tabbit.ai or tabbit.com based on your language.
30-second verdict
Choose Firefox for default privacy, open-source independence, extensions, and mobile coverage. Choose Aside if your priority is an agent that works inside authenticated websites on a macOS-leaning product. Choose Tabbit for free multi-model Agent Mode, reusable Skills, and Chromium extensions on both major desktops.
The third option
You do not have to leave Firefox for an early agent browser. Tabbit brings agentic work, model choice, and reusable Skills to the Windows and macOS machines your team already uses, while keeping Chromium-compatible extensions.
At a glance
These browsers answer different questions: autonomous agent work, open and private everyday browsing, and multi-model agent workflows. Platforms and plans change, so confirm details on each official site before switching.
Aside
Firefox
TabbitHead-to-head
The real question is not which browser “has AI.” It is whether you need an autonomous worker in your accounts, default privacy and open-source freedom, broad device coverage, or a free multi-model agent.
Aside is built around agents that sign in through your real accounts, complete multi-step tasks, and keep memory locally. Firefox AI is optional and aimed at assistance, not autonomous account work. Tabbit Agent Mode is designed for multi-step, multi-tab execution and reusable Skills.
Firefox blocks trackers by default, is open source, and is backed by the non-profit Mozilla that does not sell personal data. Aside focuses on local memory and approval around agent actions. Tabbit keeps task context deliberate rather than coupling every account silently.
Firefox covers Windows, macOS, Linux, Android, and iOS. Aside’s public download path has leaned macOS. Tabbit covers Windows and macOS, the two primary desktop environments, but is not a mobile browser.
Firefox’s AI is optional and privacy-respecting, but it is not an agent that operates your logged-in services. Aside and Tabbit are the better fit when the goal is completing a workflow across tabs and websites rather than receiving an answer in chat.
Firefox is free, but its AI is not an agent layer. Aside has free and paid tiers to confirm on its site. Tabbit’s public beta lets you try multi-model Agent Mode and Skills without a paid seat.
The Firefox question
Community threads ask whether Firefox is dying or whether a “better” browser exists. The honest answer: Firefox remains a strong private, open, cross-platform browser, but its AI is not built to operate your accounts for you. That is where agent browsers like Aside and Tabbit come in.
Reasons include habit and default status (Chrome ships on many devices), missing features on some sites, and concern about Mozilla funding and direction. Firefox still updates actively and remains strong on privacy, customization, and open-source independence.
No. Firefox continues to ship regular releases, keeps a meaningful share among privacy-focused users, and runs on Windows, macOS, Linux, Android, and iOS. It is not the default browser for most devices, which is different from being dead.
It depends on the job. For private everyday browsing with extensions and mobile support, Firefox is still among the best. For autonomous work inside your logged-in accounts, an agent browser such as Aside or Tabbit is a different category worth comparing.
For privacy, open-source freedom, tab groups, reader mode, and cross-platform use, yes. If your goal is AI that performs multi-step work in your accounts, compare Firefox’s optional AI with Aside and Tabbit Agent Mode instead.
Which one for you
Aside is Chromium-based, Firefox is Gecko-based, and Tabbit is Chromium-based. The better choice depends on whether your next priority is privacy, open ecosystems, or agent work.
You want an agent that acts inside your logged-in tools, keeps local memory, and asks before sensitive steps. Confirm platform availability and plan limits on Aside’s official site.
You want default tracker blocking, open-source freedom, extensions, and coverage on desktop and mobile without an AI that touches your accounts.
You need a multi-model agent, reusable Skills, and Chrome-compatible extensions on both Windows and macOS without committing to a paid agent plan.
The honest part
Why Tabbit
Keep the browser habits you trust while adding a practical agent layer. Tabbit is for people who want more than private browsing but want to evaluate agent workflows before paying.
Run the same browser-agent workflow across the two desktop systems most teams depend on, instead of waiting for a Mac-leaning product or a browser AI that stops at chat.
Choose GPT, Claude, Gemini, DeepSeek, Qwen, and more by task—from research and drafting to forms and multi-tab execution.
Turn recurring instructions and browser routines into Skills, so useful workflows do not start from a blank prompt every time.
Keep the extension ecosystem you know and test free Agent Mode before deciding whether a paid agent tier is worth it.
FAQ
Firefox is an open-source browser by Mozilla that focuses on default privacy, customization, extensions, and cross-platform support. Aside is an AI agent browser positioned to complete real work inside your logged-in websites, with local memory and an agent password manager. They overlap as browsers, but their main jobs are different.
Not overall—it is a different category. Firefox wins on privacy defaults, open-source independence, extensions, and mobile coverage. Aside wins on autonomous agent work in your accounts. For a third option, Tabbit combines multi-model Agent Mode with Chrome-compatible extensions on Windows and macOS.
Yes. Firefox blocks trackers by default, offers private windows, and is open source, so its privacy behavior can be inspected. It is run by the non-profit Mozilla, which does not sell personal data.
Aside’s public download path has leaned macOS. Check aside.com for current Windows support before adopting it across a team. Firefox supports Windows and many other platforms; Tabbit is available on Windows and macOS.
Firefox has optional AI features that you can turn off. They are designed to be private and assistive rather than autonomous account-operating agents. For autonomous work, compare Aside and Tabbit Agent Mode.
Choose Firefox for private, open, cross-platform browsing. Choose Aside for Mac-leaning, authenticated agent work. Choose Tabbit for free multi-model Agent Mode, Skills, and Chrome Web Store compatibility on Windows and macOS.
Download Tabbit free for multi-model Agent Mode and Skills on macOS and Windows.