Can you put the tabs on top setting in 'Options - Tabs' so it's easy to get at?

Question

To save all this messing about with tabs everytime a new version of FF updates, I suggest the tabs on top setting is placed in 'Options - Tabs' so it's easy to get at. Lots of people seem to have this problem, for them and me, we prefer to have Tabs on Bottom like they used to be.
Now we have to load an addin to correct this short-sightedness. I think this is a bad idea also. Why can't the browser just work straight out of the box? It did before!
And while we are at it, the new updates should leave our customisations as they were, so we don't have to reset them all every time there's an update. In fact, during an update we are asked if we want to import settings etc from IE or don't import anything, but no option to import from the outgoing FF!!!!
Many moons ago Firefox was a breeze now it's become a nightmare!

Answer 1

Support to disable "Tabs on Top" has been removed from Firefox 29 and later and toggling the browser.tabs.onTop pref to false on the about:config page is no longer possible.
You can look at the Tabs On Bottom or the Classic Theme Restorer extension to restore this functionality.
* https://addons.mozilla.org/firefox/addon/tabs-on-bottom/
*https://addons.mozilla.org/firefox/addon/classicthemerestorer/
You can move the tabs to the lower position just above the browsing area without using an extension with code in userChrome.css as basically you only need to give the Tab bar a higher -moz-box-ordinal-group value (most toolbars have a default -moz-box-ordinal-group:1 to show them in DOM order).
Add code to the <b>userChrome.css</b> file below the default @namespace line.
*http://kb.mozillazine.org/userChrome.css
<pre><nowiki>@namespace url("https://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* only needed once */
#TabsToolbar { -moz-box-ordinal-group:10000 !important; }
</nowiki></pre>
The customization files userChrome.css (user interface) and userContent.css (websites) are located in the <b>chrome</b> folder in the Firefox profile folder.
*http://kb.mozillazine.org/Editing_configuration
* Create the chrome folder (lowercase) in the <xxxxxxxx>.default profile folder if this folder doesn't exist
* Use a plain text editor like Notepad to create a (new) userChrome.css file in this folder (the names are case sensitive)
* Paste the code in the userChrome.css file in the editor window
*Make sure that the userChrome.css file starts with the default @namespace line
* Make sure that you select "All files" and not "Text files" when you save the file via "Save file as" in the text editor as userChrome.css. Otherwise Windows may add a hidden .txt file extension and you end up with a not working userChrome.css.txt file
You can use this button to go to the currently used Firefox profile folder:
*Help > Troubleshooting Information > Profile Directory: Show Folder (Linux: Open Directory; Mac: Show in Finder)