firefoxfirefox-57firefox-extensions
How to hide/disable/remove the tab bar in Firefox 57+ ("Quantum")?
The goal is to just hide the tab bar totally. Useful if paired with extensions like "Tree Style Tab".
Note: there is similarly looking question here: Firefox hide everything except content area of the browser but it is not properly split into logically independent tasks. Also, it's outdated.
Click on the Firefox 3-line Menu on the right.
Select Customize at the bottom.
Click on Title Bar in the bottom left corner.
The easiest way is to install relevant add-ons in Firefox.
For any of the following setup, install the respective add-ons. Firefox may need to restart, but often unnecessary for Firefox Quantum. The shortcut key, if available, can be changed from Add-ons Manager > Extensions for respective add-on.
Firefox has a redesigned keyboard shortcuts section to manage all shortcuts in one place, which has been made available since Firefox 66.
Setup A uses the following add-ons:
For example, I have used separate keys F3 and F4 to toggle the navigation menu and tab bar (via Hide Navigation Bar and Hide Tabbar) respectively. To hide the bars, press the assigned keys one by one. This will give Firefox with visible title bar or window decoration only.
Limitation: Assigning the same key does not work well, because of some delay in between. The result is similar even if the separate keys were pressed at the same time. Either way, one of the bars will not hide and play hide-and-seek with the user.
Works with Firefox 56 and earlier (Deprecated), but no longer available from Firefox Add-ons. Tested altogether with Firefox 41.0 on Linux. No screenshot.
Setup B uses the following add-ons:
Go to a web page on HTTP, HTTPS, or localhost, then use the keyboard shortcut or click the corresponding icon on toolbar or "New window without toolbar" in context menu. The web page will additionally open in a new window with visible title bar and vertical scroll bar only.
Keyboard shortcut: Shift+Alt+N (default in 1.3.0)
Limitation: This add-on does not open any page on local filesystem (file:///) and built-in pages (about:*) at all.
Works with Firefox 42 and later. Tested 1.3.0 with Firefox 69.0 on Linux.
Setup C uses the following add-ons:
Go to a web page, then click the corresponding icon on toolbar or either "Move current tab to pop-up window" or "popup/merge current page" in context menu. The web page will move to a new window with visible title bar and vertical scroll bar only. To revert the new window to a normal tab, click again on "popup/merge current page" in the context menu.
Keyboard shortcut: Not assigned (default in 0.0.8)
Limitation: The pop-up window will always stay on top of original window of Firefox, which can not be changed.
Works with Firefox 53 and later. Tested 0.0.8 with Firefox 69.0 on Linux.
I have posted a separate answer at below (click or scroll down) that works for any release of Firefox, but not the easiest way and has no keyboard shortcuts.
Best Answer
~/.mozilla/firefox/<profile>~/Library/Application Support/Firefox/Profiles/<profile folder>~/Library/Mozilla/Firefox/Profiles/<profile folder>%appdata%\Mozilla\Firefox\Profiles\<profile folder>chrome/if it doesn't existchrome/userChrome.cssinside if it doesn't exist.Add this text to the file:
Ensure the config
toolkit.legacyUserProfileCustomizations.stylesheetsis set totrue(required for Firefox69+, the stable version since September 2019), see this tutorial.Save the file and reload firefox. You should see no tab bar anymore.
P.S. Solution partly taken from here: https://www.ghacks.net/2017/09/27/tree-style-tab-is-a-webextension-now/