Firefox lets you find a specific tab when you have a lot of tabs open:

1. Click the List all tabs 👁 tab icon 2
   button at the end of the tab bar.

   👁 step_1_tabs
   

   Note: If Vertical Tabs are enabled, click the List all tabs 👁 Fx138VerticalListAllTabs
   button in the toolbar.

2. Click Search Tabs in the tab overview menu that opens.

   👁 step_2_tabs
   

You can also find specific tabs using the address bar. Type a % before or after your search term to filter the results to only open tabs.

Examples:

Results when typing % before the search term:

👁 exmp_1_before

Results when typing % after the search term:

👁 exmp_2_after

See the Address bar autocomplete suggestions in Firefox article for more options available in the address bar.