How can I hide the vertical side bar tabs menu?

Hello,

To collapse the vertical side tabs menu in firefox, press Cmd + Option + Z to toggle vertical tabs on and off. Alternatively, you can also click the cog icon on the sidebar and toggle it off.

If you want to adjust auto hide preferences, go to menu > settings > general > tabs, then look for Sidebar or Vertical Tabs and adjust hiding preferences accordingly.

Thanks a lot. The cog icon adjustment does seems to do the job. But just for your info : Cmd + Option (alt) + Z does something odd - a new black sub window appears at the bottom of the page to do with Inspector / Console / + other things ; my Settings does not seem to have any of the sub options you mention (I had tried this one before).

Can I ask something else. I need to change my primary Mozilla email address - I can get it to send me a confirmation code to get at my personal info page but on that page it wont let me make any change to that one piece of info. Any ideas?

Hello,

To change your primary email address, go to menu > Mozilla account (your email address), then click Manage Account.

After that, go to the secondary email section, click add, and add your new email and save it.

After that, go to that new email and open the verification message to confirm the address, then click the "Make primary" button on the newly added email address, and sign out then in on every synced device for the info to update.

If you want vertical tabs off completely: right-click an empty spot on the tab bar or toolbar and choose "Turn off Vertical Tabs" — tabs go back on top. You can also do it from the gear icon at the bottom of the sidebar → Customize Sidebar → untick "Vertical tabs".

If you just want the sidebar hidden for now (but keep vertical tabs on): click the "Show sidebars" button in the toolbar, or press Ctrl+Alt+Z — that collapses it to a slim icon strip, and pressing it again expands it.

Note: vertical tabs arrived in Firefox 136, so if you don't see "Turn off Vertical Tabs" in the right-click menu, update first via Menu → Help → About Firefox.

the gear icon at the bottom seems to do it other things that are supposed to work don't seem to thanks