Firefox 121.0.1 fixes a hang and a USB security key issue

[harlan4096]

Firefox 121.0.1 will be released later today, if you are reading this on January 9th, 2024. The new stable update for Mozilla's Firefox web browser is a non-security update. It addresses four issues in total, including a hang under certain circumstances and a USB security key issue that may prevent use of the security key after use in Firefox.

Firefox users who experience the issues may want to update their browser as soon as the update is released. A click on Menu > Help > About Firefox does that.

The window that opens displays the current version and runs a check for update. Firefox should download and install the update at this point, provided that Mozilla released it already.

Firefox 121.0.1 is the first point update for Firefox 121, released in December 2023.

Firefox 121.0.1

The official release notes are not available at the time of writing. You may access them here later today.

Mozilla addressed four non-security issues in Firefox. The first addresses a hang in Firefox that may occur on sites with "column-based layouts" according to Mozilla. The bug report reveals that the site Doordash is one of these.

The bug reporter explains that the page failed to load in Firefox, that elements are missing, scrolling is "barely usable" and that it is not possible to interact with the page properly. The update resolves the issue in Firefox. The Doordash page as well as other pages with similar characteristics should work fine again after installation of Firefox 121.0.1.

The second issue affects use of security keys in Firefox. When a security key is used in Firefox, existing Firefox won't terminate the browser's process. This results in reopening issues until the old process is killed on the device. Mozilla engineers discovered furthermore that use of the USB security key was blocked once the issue was triggered. The killing of the Firefox process allowed the key to be used again.
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