An option to create a new tab at left of the current, or show left tab after current closed.

[Xysong]

I have opened about several hundreds of tabs at firefox. (Maybe it's a bad habit too keep too many tabs.)

When I open new tab at right side of the current one, the feature about closing the new tab and show the last one doesn't always work.

I hope firefox can support one of my advices below, if two the better:

1. Support the option to create a new tab at the left of current tab;
2. Support the option to close the current tab and show the left one.

[Jon]

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[Anonymous]

This should help:

https://addons.mozilla.org/firefox/addon/select-after-closing-current/