I finally found what appears to be the cause of this for my situation. If I pin a tab on a browser & then through the course of doing different things I open a second browser window, it doesn't have the app tabs pinned.

Then if I close the first browser (with the app tabs) and then close the second browser window afterwards, when I reopen Firefox the original pinned tabs are gone.

For me it appears that the order of closing browser windows makes all the difference.

I don't understand why the pinned tabs aren't on all browser windows. Maybe there's a fix out there somewhere for this.

App tabs and tab groups are stored as part of the session data in sessionstore.js
If you close windows then only the last closed window will be remembered, so you need to close the Firefox application via Firefox > Quit Firefox to close all open windows at once.

EXCELLENT! And now I've pulled that little red 'X' button out of the chest of toolbar buttons & everything is perfectly simplified.

Thanks for this info (you're doing a great job posting advice & solutions!)

I have the same problem.. I only have one Pinned Tab, which is my homepage since HOME is all the way on the other side of the browser, I wanted it on the left. But the pinned tab HOME changes to another site by itself. I also keep hearing about a FIREFOX button and I can't find one anywhere.

Right-click anywhere in the toolbar, click 'Customize' and you can drag the 'home' button anywhere you want including putting back on the left side like you had it before.

I think the "FIREFOX button" that folks are referring to is the orange 'Firefox' tab in the top left that contains a number of functions.

https://support.mozilla.com/en-US/questions/792784

Related Question.

Go to firefox preferences Go to Privacy tab Make sure .... firefox will 'remember history' Make sure .... clear my browser history on close is unchecked This should work ... it did for me!!!!

Thanks cor-el,

However, this is not a 'solution'. Any suggestion that forces the end-user out of thier 'normal' routine in order to utilize functionality is not a 'solution'. Clicking the the red 'X' (Close) button in the top right of any window is 'THE' established way to shut down an application. Clicking "Firefox > Quit Firefox to close all open windows at once" is a 'workaround' to a bug and should be treated as such.

I'm not sure how these forums work, but I too have the exact problem as described by 'iwoaman'. I would like to know if a true 'solution' is being worked on for this item.

Thanks.

TOMEVANS1412, that exactly how I see this problem and i want to suscribe to this.

I see pinned tabs as preloaded, ultra accessible favorites, but i don't want them to reload and slow Firefox anytime I open a new window.

So either : - they are on every windows but load only once at firefox startup (and reuse the loaded data when you create a new window ).

- they load only on your first opened window, and if you pin tabs on other windows, you might loose them or you just can't.

Of course I have no idea how hard it is to implement this is just my idea ... Thanks Mozilla