Mozilla has started to remove features from Firefox that it believes do more harm than good ever since Firefox 4 was released. While that may protect inexperienced users from themselves, by removing options from Firefox that can make it unusable, it annoys experienced users who know what they are doing.
Options to modify those preferences are still available, but they are not as easily accessible than before anymore.
SettingSanity is a new Firefox extension that adds all missing preferences back to the Firefox options. All you need to do is install the extension and restart the browser to get access to the removed preferences again.
- Move or resize popup windows.
- Raise or lower windows.
- Disable or replace context menus.
The exceptions list enables you to specify websites that you want images to be loaded on automatically, or blocked on. You can use it to turn off the automatic loading on all pages and whitelist a couple of pages that you want images to be loaded on, or the other way round (allow images but block them on some domains).
You find the option to always display the tab bar in the options.The author notes that the browser.tabs.autoHide is used again as well if set in the browser.
Please note that the main add-on page is not offering the latest version of the extension. If you install it, you will notice that the always show tab bar option is not added to the preferences.
You need to scroll down on the page of the add-on and click on Version Information > See complete version history for an option to install the latest version of the extension that adds the tab bar option back to the browser.
Add-on developers come to the rescue once again highlighting how strong the browser's customization options really are. While not explicitly mentioned by the author of the extension, it is likely that the extension may introduce other features back to Firefox that Mozilla removed from it.