Update instructions about using built-in bridges in Tor Browser
https://tb-manual.torproject.org/circumvention/
The UX has changed a bit. Let's review and update this section about using built-in bridges with Tor Browser.
USING PLUGGABLE TRANSPORTS
To use a pluggable transport, click "Configure Connection" when starting Tor Browser for the first time. Under the "Bridges" section, locate the option "Choose from one of Tor Browser's built-in bridges" and click on "Select a Built-In Bridge" option. From the menu, select whichever pluggable transport you'd like to use.
Once you've selected the pluggable transport, scroll up and click "Connect" to save your settings.
Or, if you have Tor Browser running, click on "Settings" in the hamburger menu (≡) and then on "Connection" in the sidebar. Under the "Bridges" section, locate the option "Choose from one of Tor Browser's built-in bridges" and click on "Select a Built-In Bridge" option. Choose whichever pluggable transport you'd like to use from the menu. Your settings will automatically be saved once you close the tab.