fix(guides): Add tabs and tab groups permissions

Author: marcelklehr

guides/install-browser.md

@@ -22,4 +22,7 @@ Your browser will ask you to confirm installation, including the permissions nec
 | Unlimited web access      | Also sometimes called "read and change data on all websites". Necessary for accessing your self-hosted server. This cannot be limited, because everybody's server has a different URL. Unfortunately, the way webextensions work currently, floccus also gets access to all the data the browser has collected on those websites. However, floccus makes no use of that data and doesn't in any way collect information about you. |
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 | identity                  | Necessary for connecting with Google Drive                                                                                                                                                                                                                                                                                                                                                                                         |
+|                           |                                                                                                                                                                                                                                                                                                                                                                                                                                    |
+| tabs and tabGroups        | Necessary for syncing tabs and tab groups                                                                                                                                                                                                                                                                                                                                                                                          |
+|                           |                                                                                                                                                                                                                                                                                                                                                                                                                                    |
 | history (optional)        | Necessary for sending statistics about which links you click to Nextcloud Bookmarks (this feature is opt-in)                                                                                                                                                                                                                                                                                                                       |