Attach to an existing Firefox tab

Hello first time,
Can I attach Kantu (by API) to an exiisting Firefox tab with website?

Add continueInLastUsedTab=1 to your command line.

See here:

If you want to combine a series of command line calls and want to make sure that the next macros continues in the tab where the last macro stopped (the active tab), then use this switch. Otherwise Kantu opens a new tab for each new command line call. An example of when “continueInLastUsedTab=1” will be useful is if the first macro does the login, the second macro runs a test and third macro does the log off. Then you want to make sure all three macro work in the same browser tab.