How can I activate specific tabs in Chrome or Firefox with AutoHotkey?

I have been working on functions to achieve this functionality for a while. I have completed this project just now, and have a script that should achieve the functionality you require.

Note: depending on changes to Firefox and Chrome, these scripts can breakat any time, as have previous attempts at manipulating Firefox tabs,however do check the AutoHotkey forums for updates, and/or the following link:

Firefox/Chrome, get tab names/focus tab - AutoHotkey Community
https://autohotkey.com/boards/viewtopic.php?f=6&t=26947&p=126248#p126248

Note: this script requires the Acc library to run, see the link:

Acc library (MSAA) and AccViewer download links - AutoHotkey Community
https://autohotkey.com/boards/viewtopic.php?f=6&t=26201

GroupAdd, vGroupFirefoxAndChrome, ahk_class MozillaWindowClassGroupAdd, vGroupFirefoxAndChrome, ahk_class Chrome_WidgetWin_1#IfWinActive, ahk_group vGroupFirefoxAndChrome^a::^b::^c::^d::^e::^f::^g::^h::^i::^j::^k::^l::^m::^n::^o::^p::^q::^r::^s::^t::^u::^v::^w::^x::^y::^z::WinGet, hWnd, ID, AWinGetClass, vWinClass, ahk_id %hWnd%vLetter := SubStr(A_ThisHotkey, 1-1)vNum := Asc(vLetter)-96if (vWinClass = "MozillaWindowClass")JEE_FirefoxFocusTabByNum(hWnd, vNum)if (vWinClass = "Chrome_WidgetWin_1")JEE_ChromeFocusTabByNum(hWnd, vNum)Return#IfWinActive;==================================================JEE_FirefoxGetTabNames(hWnd, vSep="`n"){oAcc := Acc_Get("Object", "4", 0, "ahk_id " hWnd)Loop, % oAcc.accChildCountif (oAcc.accName(A_Index) = "Browser tabs")if (1, oAcc := Acc_Child(oAcc, A_Index))breakoAcc := Acc_Child(oAcc, 1)vOutput := ""Loop, % oAcc.accChildCount{vTabText := oAcc.accName(A_Index)if !(vTabText == "");if !(vTabText == "New Tab");if !(vTabText == "Open a new tab")vOutput .= vTabText vSep}vOutput := SubStr(vOutput, 1, -StrLen(vSep)) ;trim rightoAcc := ""Return vOutput};==================================================JEE_FirefoxFocusTabByNum(hWnd, vNum){oAcc := Acc_Get("Object", "4", 0, "ahk_id " hWnd)Loop, % oAcc.accChildCountif (oAcc.accName(A_Index) = "Browser tabs")if (1, oAcc := Acc_Child(oAcc, A_Index))breakoAcc := Acc_Child(oAcc, 1)vRet := 0For each, oChild in Acc_Children(oAcc){if (A_Index = vNum)if (1, oChild.accDoDefaultAction(0), vRet := A_Index)break}Return vRet};==================================================JEE_FirefoxFocusTabByName(hWnd, vTitle, vNum=1){oAcc := Acc_Get("Object", "4", 0, "ahk_id " hWnd)Loop, % oAcc.accChildCountif (oAcc.accName(A_Index) = "Browser tabs")if (1, oAcc := Acc_Child(oAcc, A_Index))breakoAcc := Acc_Child(oAcc, 1)vCount := 0vRet := 0For each, oChild in Acc_Children(oAcc){vTabText := oChild.accName(0)if (vTabText = vTitle)vCount ++if (vCount = vNum)if (1, oChild.accDoDefaultAction(0), vRet := A_Index)break}oAcc := ""Return vRet};==================================================JEE_ChromeGetTabNames(hWnd, vSep="`n"){oAcc := Acc_ObjectFromWindow(hWnd)oAcc := Acc_Child(oAcc, 1), oAcc := Acc_Child(oAcc, 2)oAcc := Acc_Child(oAcc, 2), oAcc := Acc_Child(oAcc, 2)vOutput := ""For each, oChild in Acc_Children(oAcc){vTabText := Acc_Child(oChild, 1).accName(0)if !(vTabText == "")vOutput .= vTabText vSep}vOutput := SubStr(vOutput, 1, -StrLen(vSep)) ;trim rightoAcc := ""Return vOutput};==================================================JEE_ChromeFocusTabByNum(hWnd, vNum){oAcc := Acc_ObjectFromWindow(hWnd)oAcc := Acc_Child(oAcc, 1), oAcc := Acc_Child(oAcc, 2)oAcc := Acc_Child(oAcc, 2), oAcc := Acc_Child(oAcc, 2)vRet := 0For each, oChild in Acc_Children(oAcc){if (A_Index = vNum+1)if (1, oChild.accDoDefaultAction(0), vRet := A_Index)break}Return vRet};==================================================JEE_ChromeFocusTabByName(hWnd, vTitle, vNum=1){oAcc := Acc_ObjectFromWindow(hWnd)oAcc := Acc_Child(oAcc, 1), oAcc := Acc_Child(oAcc, 2)oAcc := Acc_Child(oAcc, 2), oAcc := Acc_Child(oAcc, 2)vCount := 0vRet := 0For each, oChild in Acc_Children(oAcc){vTabText := oChild.accName(0)if (vTabText = vTitle)vCount ++if (vCount = vNum)if (1, oChild.accDoDefaultAction(0), vRet := A_Index)break}oAcc := ""Return vRet};==================================================