This is an older version. The current version is 159.0. Mozilla Firefox (eo) 159.0 · Released:
153.0.3 is part of the 153 (ESR) line, which is still supported. endoflife.date
Installer files 153.0.3
| Architecture | Type | Scope | File size | Download | SHA256 |
|---|---|---|---|---|---|
| 64-bit | EXE (NSIS) | All users | — | download-installer.cdn.mozilla.net | VirusTotal |
| ARM64 | EXE (NSIS) | All users | — | download-installer.cdn.mozilla.net | VirusTotal |
| 32-bit | EXE (NSIS) | All users | — | download-installer.cdn.mozilla.net | VirusTotal |
Link and SHA256 come from the Windows Package Manager community manifest. Compare the hash of the downloaded file before running it.
Release notes
Version 153.0.3, first offered to Release channel users on August 4, 2026
New
- Smart Window includes several enhancements:
- The suggestion list now shows more results, making it easier to find history and switch to open tabs. (Bug 2019042)
- The assistant can now answer questions directly using web search results from Exa, instead of handing off to a search engine. (Bug 2046183, Bug 2044385)
This feature is part of a progressive roll out.
What is a progressive roll out?
Certain new Firefox features are released gradually. This means some users will see the feature before everyone does. This approach helps to get early feedback to catch bugs and improve behavior quickly, meaning more Firefox users overall have a better experience.
Fixed
- Fixed audio and video failing to play, or hanging when seeking, on websites that load media from a Blob URL. (Bug 2056444)
- Fixed Internet shortcuts dragged from Firefox to the desktop being marked as untrusted on Windows, which caused a security warning every time they were opened. (Bug 2056865)
- Fixed the Bookmarks, History, and other sidebars failing to open when the sidebar is hidden and the password manager has been turned off by an enterprise policy. (Bug 2056857)
- Fixed a Mozilla VPN upgrade offer appearing for people in regions where Mozilla VPN is not sold. (Bug 2058264)
- Fixed frequent Inspector crashes in the Developer Tools on pages where an extension content script had added event listeners. (Bug 2042101)
- Fixed a rare case on Windows where starting Firefox while a partial update was still being applied could leave the installation broken and unable to start. (Bug 2058197, Bug 2058594)
- Reference link to 153.0.1 release notes.
