Right Next browser extension make new tab place right next to current tab.

Download: Mozilla Addons

Right Next can handle these situations:

• Open new tab in foreground/left click.
• Open new tab in background/middle click.
• Open new tab from pinned tab.
• Open new tab from/to container.

Right Next also done with very less code which make it has good performance.

NO.

When Mozilla fixed this issue, then this extension has its mission done.

If you don't open new tab by middle click, you can simply change these settings:

browser.tabs.insertAfterCurrent: true
browser.tabs.insertRelatedAfterCurrent: false

These extensions work well too, but can't handle all situations.

• Open Tabs Next to Current - can't handle container tab.
• Always Right - can't handle middle click because it simply change your browser settings which affect by the issue mention above.

Note: Observed on 2021-05-28.

If you find any unexpected behaviour, you can file a issue here.