When to Use Protect Tab vs Lock Tab in Firefox
One of the best extensions for Firefox is Tab Mix Plus because of the enhancements to the tab browsing that can't be found elsewhere. There is also another extension called tab browser extensions that provides similar functionality.
There are two options that provide similar but possibly confusing functionality. You can see in the screenshot below the Protect Tab and Lock Tab on the menu.
Here's when you should use each feature:
Protect Tab
- If you want to make sure that a tab cannot be closed. This is useful to make certain you don't accidentally close a tab.
Lock Tab
- A lock tab cannot navigate to a new URL. This means that it is "locked" on the current URL. If you have this tab selected and you click a bookmark link, history, or a link on the page, the link will open in a new tab.
You can also combine the two on a single tab. For instance, I both lock and protect my Google Reader tab, which I always keep as the first tab so I can quickly switch back to it.


AWESOME TIP! this is what exactly wht i needed and once again google did it - tnx
thnx! i really needed this info!
Thnx !!!! very useful tip, it doesn't appear in firefox's help
Excellent tip. Thanks.
There is a keyboard shortcut for lock tab which i stumbled upon accidentally one day a while ago. But now i cant remember it and cant find it anywhere online. Anyone know this?
Oops forgot to subsrcibe.
Shift + click on the tab will lock it, and alt+click will protect it.
Thanks Mr Geek, you rock!
No wonder i couldn't work out what i did, i must have sat their for at least half an hour scouring google and trying every keyboard combination imaginable. At least i found a couple of keyboard shortcuts i didnt know like windows key + L which locks the computer, instead of having to go ctrl+alt+del then enter…
aha, thank you! yeah, using two very similar terms for these menu items isn't such a good idea IMHO. maybe something a little more verbose like "protect tab from closing" and "lock tab URL" would be more helpful.. perhaps i will suggest to the developer.
And if you want to make your locked tabs smaller, use Faviconize Tab (https://addons.mozilla.org/en-US/firefox/addon/3780)
I also want the function like Win+L, which means to ask for a password when tab activated.
I do the same with Gmail. But, I prefer to use this extension, https://addons.mozilla.org/en-US/firefox/addon/2558
The difference is this extension will keep tabs locked between sessions (even if your session wasn't saved), and also gives permanent tabs a different color.
Good to know, but Stumble Upon ignores the "Lock" and opens the next site in the current tab.
Oh, I've always wondered what those two options did. Totally didn't realise till I needed them
Yahoo toolbar also ignores the lock option.
great yeah - you plus google - great team
This site is SOOOOO helpful…Thanks…
Funny, I couldn't find any explanation of 'lock tab' and 'protect tab' functionality on Firefox and Tab Mix Plus sites :] It turns out I really need them
Thanks a bunch for your help!
I have spent one hour trying to figure out how to protect or lock single tabs using firefox for osx.
I can only lock or freeze all tabs or non at all. I have tried protecting and locking tabs in the tab context and main contest menus but nothing works.
I would very much appreciate your help
Luis