Firefox 148 Introduces an AI “Kill Switch” to Completely Disable All AI Features

Mozilla is delivering exactly what it promised. Starting February 24, 2026, Firefox 148 will include a long-awaited global AI disable button, allowing users to block all current and future AI-powered features in the browser with a single click. This so-called “AI kill switch”, first announced in December, is designed for users who want full control over how artificial intelligence is used—or not used—inside Firefox.

Unlike partial toggles or hidden flags, Mozilla’s approach is transparent, persistent, and user-first.

A Centralized AI Control Panel in Firefox Settings

Firefox 148 introduces a brand-new “AI Controls” section directly inside the browser’s settings. This panel provides two levels of control:

• A global toggle labeled “Block AI-powered enhancements” that disables everything at once
• Individual controls for each AI feature, allowing selective activation if you prefer a granular approach

When you enable the global block, Firefox displays a clear confirmation dialog explaining exactly which features will be disabled. Once confirmed, those features are immediately removed from the interface—no prompts, no reminders, and no reactivation nags.

Importantly, Mozilla confirms that this setting is persistent across updates. If you block AI in Firefox 148, it will remain disabled in Firefox 149, 150, and beyond. The kill switch does not reset when upgrading the browser.

The Five AI Features Affected by the Global Block

Firefox 148 focuses specifically on generative AI features. Activating the AI kill switch disables all five of the following tools at once.

1. On-Device AI Translations

Firefox uses generative AI to translate web pages into your preferred language without relying on third-party cloud services. This feature is fully disabled when AI blocking is enabled.

2. AI Chatbots in the Sidebar

Firefox’s sidebar can integrate popular AI assistants such as:

• ChatGPT
• Google Gemini
• Microsoft Copilot
• Anthropic Claude
• Mistral’s Le Chat

Firefox provides the interface, while users choose the provider. Blocking AI removes the chatbot panel entirely.

3. Automatic Alt Text in PDFs

This feature generates AI-written image descriptions inside PDF files to improve accessibility. It is disabled by the global switch.

4. AI-Enhanced Tab Grouping

Firefox can suggest tab group names and identify related tabs using AI. These smart grouping suggestions are turned off when AI is blocked.

5. Link Preview Key Points

Some link previews include AI-generated summaries highlighting the key points of a page. These summaries are also disabled.

At the moment, Firefox Nightly only offers individual toggles for translations and chatbots, while the other three features are controlled exclusively by the global switch. Mozilla is expected to add individual controls for all five features before Firefox 148 reaches stable release.

What the AI Controls Do Not Disable

Mozilla is careful to draw a clear distinction between generative AI and traditional machine learning. The new AI controls apply only to features powered by large language models and content generation.

The following are not affected by the AI kill switch:

• Address bar suggestions and Firefox Suggest
• Browsing history and bookmarks
• New Tab page personalization, including sponsored or recommended content
• Search engines you enable manually, including Google Lens and Perplexity

Mozilla explains that these systems have existed in Firefox for years and rely on classic machine learning techniques such as ranking, classification, and personalization—not generative AI.

Extensions Are Not Affected by the AI Kill Switch

Another important limitation: the AI controls do not restrict browser extensions.

If an extension connects to external AI services like ChatGPT, Copilot, or other APIs, it will continue to do so even when Firefox’s AI features are fully blocked. The kill switch applies only to AI tools built directly into Firefox itself.

This ensures Firefox doesn’t overstep its boundaries by interfering with third-party add-ons.

Why Mozilla’s AI Kill Switch Matters

At a time when many browsers are aggressively integrating AI with few opt-out options, Mozilla is taking a different path—one centered on user choice, transparency, and long-term control.

By offering:

• A visible, centralized AI control panel
• A true one-click global disable option
• A setting that persists across future releases

Firefox 148 sets a new standard for how browsers can responsibly introduce AI without forcing it on users.

Final Thoughts

With Firefox 148, Mozilla proves that adding AI doesn’t have to mean sacrificing user autonomy. The new AI kill switch gives privacy-conscious users, professionals, and minimalists a powerful way to keep their browser lean, predictable, and AI-free—now and in the future.

As AI features continue to expand across the web, Firefox’s approach stands out as one of the most respectful implementations yet.