Firefox 81.0.2 update

Published a corrective release of Firefox 81.0.2, which fixed incompatibility with Twitter, a workaround for which has already about the release of an unofficial build marked as 'beta.' However, this version is still not available on the official website. It is likely that the company simply allowed the leak. been posted last week. The issue manifests as a network protocol failure error when trying to open Twitter, and without modifying the browser's code, it can be resolved by removing the site-related handler from the 'about:serviceworkers' page.

Additionally, it can be noted the emergence of in the nightly builds of Firefox, the 'Tab-to-search' feature, allowing allows users to switch to search mode by pressing the Tab key or the down arrow while typing in the address bar, selecting the active search engine based on the entered characters if one of the installed search engines is suggested by the autocomplete (for example, typing 'ya' will suggest 'yandex.ru', after which pressing Tab will activate the query input mode for Yandex). Additionally, the print preview mode now offers the ability to change margin sizes.

Source: opennet.ru