Mozilla will shut down Pocket’s services on July 8, 2025. At that time users will no longer be able to access the Pocket website, apps and API. You can export your saved items and API data until October 8, 2025 before they are permanently removed. For more information, see this article.

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

ALT-SHIFT-LEFT got remapped to 'select tab to the left' out of the blue

ALT-SHIFT-LEFT has been 'select word backwards' for years, at least on macs. And so it was on FF too. Now they suddenly decided to re-map it to 'select left tab'. There was already a key for that - CMD-ALT-LEFT. Which also works for the right, whereas ALT-SHIFT-RIGHT does nothin

ALT-SHIFT-LEFT has been 'select word backwards' for years, at least on macs. And so it was on FF too. Now they suddenly decided to re-map it to 'select left tab'. There was already a key for that - CMD-ALT-LEFT. Which also works for the right, whereas ALT-SHIFT-RIGHT does nothin

Modified by fritzthecat4

Chosen solution

Hi, this issue has been linked to the Tree Style Tabs extension. Not sure whether there was a coincidence of updates or if it interacts with Firefox 127 in an unexpected way.

https://connect.mozilla.org/t5/discussions/option-shift-arrow-now-switches-tabs-since-v-127/td-p/59298

Read this answer in context 👍 1

All Replies (3)

Chosen Solution

Hi, this issue has been linked to the Tree Style Tabs extension. Not sure whether there was a coincidence of updates or if it interacts with Firefox 127 in an unexpected way.

https://connect.mozilla.org/t5/discussions/option-shift-arrow-now-switches-tabs-since-v-127/td-p/59298

Phew, emergency over 😆 - you are totally right @jscher2000 and thanks for that

I almost ditched FF because of this, the solution is discussed in this github issue https://github.com/piroor/treestyletab/issues/3575

Thank you for reporting back with that link. Hopefully others will find it more easily now.