That’s what the website ‘Just the Browser’ promises:

Just the Browser aims to remove the following functionality from popular web browsers:

• Most AI features: Features that use generative AI models, either on-device or in the cloud, like Copilot in Microsoft Edge or tab group suggestions in Firefox. The main exception is page translation in Firefox.
• Shopping features: Price tracking, coupon codes, loan integrations, etc.
• Sponsored or third-party content: Suggested articles on the New Tab Page, sponsored site suggestions, etc.
• Default browser reminders: Pop-ups or other prompts that ask you to change the default web browser.
• First-run experiences and data import prompts: Browser welcome screens and their related prompts to import data automatically from other web browsers.
• Telemetry: Data collection by web browsers. Crash reporting is left enabled if the browser (such as Firefox) supports it as a separate option.
• Startup boost: Features that allow web browsers to start with the operating system without explicit permission.