This is definitely a feature that needs to be an addon rather than in core Firefox, as it could easily interfere with users who organise tabs in different ways (e.g. Tree tabs)
Many of NATO’s 31 allies are parties to the Treaty of Conventional Armed Forces in Europe, which was aimed at preventing Cold War rivals from massing forces at or near their mutual borders. The CFE was signed in November 1990 as the Soviet bloc was crumbling but was not fully ratified until two years later.
For a time, clicking the “X” in the upper right corner of the Windows 10 upgrade prompt window was interpreted as consent to upgrade to the new operating system. The typical expectation for all users is that clicking the “X” ends the program, and in fact, doing so was the only way to reject the free upgrade offer for most of the pop-ups notification’s existence. The same prompt could upgrade your system to Windows 10 without explicit consent if you left you computer on for an extended period, as well. PCWorld received hundreds of reader complaints about “forced” Windows 10 after Microsoft began using those tactics.
The quotes are there because there was always technically a way available to avoid the upgrade, but there are two distinct instances listed of users being upgraded without consent.
Everywhere near me has the anti-theft devices turned up on self checkouts to the point that traditional checkouts are both faster and require less human interaction.
https://addons.mozilla.org/en-US/firefox/search/?q=Tab%20groups
This is definitely a feature that needs to be an addon rather than in core Firefox, as it could easily interfere with users who organise tabs in different ways (e.g. Tree tabs)