Unity WebGL Frame Rate Limit

function _emscripten_set_main_loop_timing(mode, value) {
    console.log("_emscripten_set_main_loop_timing called with " + mode + ", " + value); // 1: _emscripten_set_main_loop_timing called with 0, 33.333333333333336
    Browser.mainLoop.timingMode = mode;
    Browser.mainLoop.timingValue = value;
    if (!Browser.mainLoop.func) {
        return 1;
    }
    if (!Browser.mainLoop.running) {
        Browser.mainLoop.running = true;
    }
    if (mode == 0) {
        console.log("setting timeout"); // 2: called next
        Browser.mainLoop.scheduler = function Browser_mainLoop_scheduler_setTimeout() {
            var timeUntilNextTick = Math.max(0, Browser.mainLoop.tickStartTime + value - _emscripten_get_now()) | 0;
            console.log("timeUntilNextTick: " + timeUntilNextTick); // 3: called regularly with "timeUntilNextTick: 32" or "...33"
            setTimeout(Browser.mainLoop.runner, timeUntilNextTick);
        };
        Browser.mainLoop.method = "timeout";
    } else if (mode == 1) {
        Browser.mainLoop.scheduler = function Browser_mainLoop_scheduler_rAF() {
            Browser.requestAnimationFrame(Browser.mainLoop.runner);
        };
        Browser.mainLoop.method = "rAF";
    } else if (mode == 2) {
        if (typeof setImmediate === "undefined") {
            var setImmediates = [];
            var emscriptenMainLoopMessageId = "setimmediate";
            var Browser_setImmediate_messageHandler = function (event) {
                if (event.data === emscriptenMainLoopMessageId || event.data.target === emscriptenMainLoopMessageId) {
                    event.stopPropagation();
                    setImmediates.shift()();
                }
            };
            addEventListener("message", Browser_setImmediate_messageHandler, true);
            setImmediate = function Browser_emulated_setImmediate(func) {
                setImmediates.push(func);
                if (ENVIRONMENT_IS_WORKER) {
                    if (Module["setImmediates"] === undefined) Module["setImmediates"] = [];
                    Module["setImmediates"].push(func);
                    postMessage({ target: emscriptenMainLoopMessageId });
                } else postMessage(emscriptenMainLoopMessageId, "*");
            };
        }
        Browser.mainLoop.scheduler = function Browser_mainLoop_scheduler_setImmediate() {
            setImmediate(Browser.mainLoop.runner);
        };
        Browser.mainLoop.method = "immediate";
    }
    return 0;
}

function setMainLoop(browserIterationFunc, fps, simulateInfiniteLoop, arg, noSetTiming) {
    assert(!Browser.mainLoop.func, "emscripten_set_main_loop: there can only be one main loop function at once: call emscripten_cancel_main_loop to cancel the previous one before setting a new one with different parameters.");
    Browser.mainLoop.func = browserIterationFunc;
    Browser.mainLoop.arg = arg;
    var thisMainLoopId = Browser.mainLoop.currentlyRunningMainloop;
    function checkIsRunning() {
        if (thisMainLoopId < Browser.mainLoop.currentlyRunningMainloop) {
            maybeExit();
            return false;
        }
        return true;
    }
    Browser.mainLoop.running = false;
    Browser.mainLoop.runner = function Browser_mainLoop_runner() {
        if (ABORT) return;
        if (Browser.mainLoop.queue.length > 0) {
            var start = Date.now();
            var blocker = Browser.mainLoop.queue.shift();
            blocker.func(blocker.arg);
            if (Browser.mainLoop.remainingBlockers) {
                var remaining = Browser.mainLoop.remainingBlockers;
                var next = remaining % 1 == 0 ? remaining - 1 : Math.floor(remaining);
                if (blocker.counted) {
                    Browser.mainLoop.remainingBlockers = next;
                } else {
                    next = next + 0.5;
                    Browser.mainLoop.remainingBlockers = (8 * remaining + next) / 9;
                }
            }
            console.log('main loop blocker "' + blocker.name + '" took ' + (Date.now() - start) + " ms");
            Browser.mainLoop.updateStatus();
            if (!checkIsRunning()) return;
            console.log("Setting timeout to 0");
            setTimeout(Browser.mainLoop.runner, 0);
            return;
        }
        if (!checkIsRunning()) return;
        Browser.mainLoop.currentFrameNumber = (Browser.mainLoop.currentFrameNumber + 1) | 0;
        if (Browser.mainLoop.timingMode == 1 && Browser.mainLoop.timingValue > 1 && Browser.mainLoop.currentFrameNumber % Browser.mainLoop.timingValue != 0) {
            console.log("Browser.mainLoop.timingMode == 1");
            Browser.mainLoop.scheduler();
            return;
        } else if (Browser.mainLoop.timingMode == 0) {
            console.log("Browser.mainLoop.timingMode == 0");
            Browser.mainLoop.tickStartTime = _emscripten_get_now();
        }
        GL.newRenderingFrameStarted();
        Browser.mainLoop.runIter(browserIterationFunc);
        if (!checkIsRunning()) return;
        if (typeof SDL === "object" && SDL.audio && SDL.audio.queueNewAudioData) SDL.audio.queueNewAudioData();
        Browser.mainLoop.scheduler();
    };
    if (!noSetTiming) {
        console.log("fps: " + fps);
        fps = 30;
        if (fps && fps > 0) _emscripten_set_main_loop_timing(0, 1e3 / fps);
        else _emscripten_set_main_loop_timing(1, 1);
        Browser.mainLoop.scheduler();
    }
    if (simulateInfiniteLoop) {
        throw "unwind";
    }
}