Firefox 145 Is Now Available for Download, Drops 32-Bit Support on Linux

posted by Marius Nestor on Nov 10, 2025,
updated Nov 12, 2025

The biggest change in the Firefox 145 release is that it drops support for 32-bit systems on Linux. This means that Mozilla will no longer build and offer 32-bit builds of Firefox starting with version 145, recommending users to install a 64-bit version of Firefox.

Other changes in Firefox 145 include an updated Copy Link to Highlight context menu item to allow users to share arbitrary sections of a web page with others by copying a link through the context menu with a given selection, and a new “Open links from apps next to your active tab” option in General > Tabs settings.

Read on

Linuxiac:

• Firefox 145 Now Available for Download, Here’s What’s New

  Almost a month after releasing version 144, Mozilla has launched Firefox 145, the latest update to its popular open-source web browser, now available for download.

  The most visible addition in the new version is the ability to add, edit, and delete comments directly in PDFs. Users can now jot down notes, questions, or reminders right inside a document, with a convenient comment sidebar to manage annotations.

  Another quality-of-life improvement is the new tab group preview feature. By hovering over a tab group name, users can instantly see which pages are inside without expanding the group.

UbuntuHandbook:

• Firefox 145.0 is out! Removed 32-bit Linux Support | UbuntuHandbook

  After 9 Beta releases, Mozilla Firefox 145.0 is finally available to download.

  The new browser version introduced new phase of privacy protections. For Private Browsing or when using Enhanced Tracking Protection set to Strict, the amount of Firefox users track-able by fingerprinters is reduced by half. See this page for more details.

  In addition, Enhanced Bounce Tracking Protection stateless mode is now enabled by default in ETP Strict, blocking more advanced tracking techniques based on redirection.

  Firefox 145.0 improved PDF editing by adding comment support. By selecting the desired text or area in your PDF content, it will show a small pop-up menu with option to add, remove, or edit comment. And, a comment/message icon is added to tool-bar with ability to view all the comments.

OMG Ubuntu:

• Firefox 145 Brings Rounder Tabs, New PDF Edit Tools + More - OMG! Ubuntu

  Firefox 145 includes, amongst other changes, new comment/note taking tools in the built-in PDF editor, rounder tabs, buttons and input fields, and better browser fingerprinting protection.

  As a refresher, last month’s Firefox 144 added Google Lens image search options, made the browser’s profile manager available to more users, and expanded on-device translations to convert to/from more languages (including Icelandic – Þá var tími!).

  For a closer look at the latest crop of changes, read on.

LWN:

• Firefox 145 released

  Firefox 145 has been released. Notable changes in this release include note-taking features for PDFs viewed in Firefox, enhanced privacy protections, and the ability to access and manage passwords in the sidebar. This release also drops support for 32-bit GNU/Linux systems.