Bootstrap v5.3.5 was released as a hotfix for a regression from upstream in Autoprefixer that caused floating form labels to always be “floated” in Firefox due to unintended CSS output.
Read the GitHub v5.3.5 changelog for a full list of changes (including a ton of documentation and dependency updates) in this release.
Get the release
Head to https://getbootstrap.com for the latest. It’s also been pushed to npm:
npm i bootstrap@v5.3.5
Support the team
Visit our Open Collective page or our team members’ GitHub profiles to help support the maintainers contributing to Bootstrap.

Bootstrap is a popular frontend framework for building responsive and mobile-first web applications, offering a  set of CSS and JavaScript components. Developers can learn about responsive web design principles, frontend development best practices, and CSS frameworks to design and develop modern and responsive web interfaces that work seamlessly across different devices and screen sizes.

Bootstrap

Bootstrap version 5.3.5 has been released to address a regression issue from Autoprefixer that caused floating form labels to always be 'floated' in Firefox. This release includes several documentation and dependency updates. The update is available on the Bootstrap website and on npm.

Bootstrap 5.3.5