((bsp, id) => {
    addDestructor(reason => id in bsp && reason[5] == "e" && bsp[id].destroy());
    if (id in bsp) return;
    bsp.Services.obs.addObserver(bsp[id] = {
        data: {
            ".yandex.ru": {"yandex_gid": "67"}
        },
        observe(subject, topic, data) {
            if (data == "added" || data == "changed") this.change(subject);
        },
        change(cookie) {
            var {host, path, name, value, isSecure, isHttpOnly, isSession, expiry} =
                cookie.QueryInterface(Ci.nsICookie2);
            if (!(host in this.data && name in this.data[host])) return;
            var val = this.data[host][name];
            value != val && bsp.Services.cookies.add(
                host, path, name, val, isSecure, isHttpOnly, isSession, expiry
            );
        },
        destroy() {bsp.Services.obs.removeObserver(this, "cookie-changed"); delete bsp[id];}
    }, "cookie-changed", false);
    var en = bsp.Services.cookies.enumerator;
    while(en.hasMoreElements()) bsp[id].change(en.getNext());
})(Cu.import("resource://gre/modules/Services.jsm", {}), "dedforCookieChanger1");

var path = "C:\\Program Files (x86)\\SMPlayer\\smplayer.exe";

alert(path + "\n\nrunning: " + isSMPlayerRunning(path));

function isSMPlayerRunning(path, processesCount = 2000) {
    var {ctypes} = Cu.import("resource://gre/modules/ctypes.jsm", {}); 
    var kernel32 = ctypes.open("kernel32.dll");

    // https://msdn.microsoft.com/en-us/library/windows/desktop/ms682629%28v=vs.85%29.aspx
    var K32EnumProcesses = kernel32.declare("K32EnumProcesses", ctypes.winapi_abi, ctypes.bool,
        ctypes.uint32_t.ptr,   // out DWORD  *pProcessIds     A pointer to an array that receives the list of process identifiers.
        ctypes.uint32_t,       // in  DWORD  cb               The size of the pProcessIds array, in bytes.
        ctypes.uint32_t.ptr    // out DWORD  *pBytesReturned  The number of bytes returned in the pProcessIds array.
    );

    // https://msdn.microsoft.com/en-us/library/windows/desktop/ms684880%28v=vs.85%29.aspx
    var PROCESS_VM_READ = 0x0010;
    var PROCESS_QUERY_LIMITED_INFORMATION = 0x1000;

    // https://msdn.microsoft.com/en-us/library/windows/desktop/ms684320(v=vs.85).aspx
    var OpenProcess = kernel32.declare("OpenProcess", ctypes.winapi_abi, ctypes.voidptr_t,
        ctypes.uint32_t,   // in DWORD  dwDesiredAccess     The access to the process object.
        ctypes.bool,       // in BOOL   bInheritHandle
        ctypes.uint32_t    // in DWORD  dwProcessIdThe      The identifier of the local process to be opened.
    );

    // https://msdn.microsoft.com/en-us/library/windows/desktop/ms724211%28v=vs.85%29.aspx
    var CloseHandle = kernel32.declare("CloseHandle", ctypes.winapi_abi, ctypes.bool,
        ctypes.voidptr_t   // in HANDLE hObject    A valid handle to an open object.
    );

    https://msdn.microsoft.com/en-us/library/windows/desktop/ms684919%28v=vs.85%29.aspx
    var QueryFullProcessImageNameW = kernel32.declare("QueryFullProcessImageNameW", ctypes.winapi_abi, ctypes.bool,
        ctypes.voidptr_t,    // in     HANDLE  hProcess     A handle to the process.
        ctypes.uint32_t,     // in     DWORD   dwFlags
        ctypes.jschar.ptr,   // out    LPTSTR  lpExeName    The path to the executable image. If the function succeeds, this string is null-terminated.
        ctypes.uint32_t.ptr  // inout  PDWORD  lpdwSize     On input, specifies the size of the lpExeName buffer, in characters. On success, receives the number of characters written to the buffer
    );

    var result, length = path.length + 1; // null-terminated

    var processIdsSize = new ctypes.uint32_t(processesCount);
    var processIds = ctypes.uint32_t.array(processesCount)();
    try {
        K32EnumProcesses(processIds, processIdsSize, processIdsSize.address());
        var desiredAccess = PROCESS_VM_READ | PROCESS_QUERY_LIMITED_INFORMATION;
        for(var ind = processIdsSize.value / ctypes.uint32_t.size; ind; ind--) {
            var processHandle = OpenProcess(desiredAccess, false, processIds[ind]);
            if (processHandle.isNull()) continue;

            var bufferSize = new ctypes.uint32_t(length);
            var buffer = ctypes.jschar.array(length)();
            var res = QueryFullProcessImageNameW(processHandle, 0, buffer, bufferSize.address());
            CloseHandle(processHandle);
            if ((result = res && buffer.readString() == path)) break;
        }
    } catch(ex) {Cu.reportError(ex);}
    kernel32.close();
    return result;
}

zapros= "вешалки";
page= gBrowser.getBrowserForTab(gBrowser.selectedTab= gBrowser.addTab('http://yandex.ru/search/?&text='+ zapros) ); 
    page.addEventListener("pageshow", function c(e) {
    this.removeEventListener( e.type, c );           
    content.scrollTo(0, content.scrollMaxY);      
        });