在 chrome 中,当你在你的网页上按下[F12]
打开development tools
,然后用你的鼠标指针按下left click
(动作点击)REFRESH button
在 chrome 上 2 秒钟,然后你会看到三个选项点击第三个 --> 'Empty Cache and Hard Reload'
。然后你会看到正在发生的变化。

如果这行得通,那是由于 chrome 提供了缓存图像和图标的缓存系统......为了更快地浏览而不是下载重复的资源。
如果没有,请参阅此帖子:解决方案
你也可以这样做:
GIF 图标:
<link rel="icon" type="image/gif" href="data:image/gif;base64,R0lGODlhFAAUAOMAAIQCBASCBISChMTCxKRSLPSChPzu1PwCBGyOJNy6hPz+/P7+/gAAAAAAAAAAAAAAACH/C05FVFNDQVBFMi4wAwEAAAAh+QQJZAAMACwAAAAAFAAUAAAEenDJSaulIut9ZTZgCGZXNpxiSGJD6o7sOSgG7QrYpu8VkPzA4A9g8QmPxJ5iqUAEAgimIkkxJpw/KJA6sQaC3+EFAAoYEAiD2cCt/rAJbaLdJdidUDuBe1j0yS8gfAd9C4AuAAUFC4p+XUdDipI9kHOMjUUAmptUiwsRACH5BAlkAAwALAAAAAAUABQAg4QCBASCBISChMTCxPxiRPSChPzu1KQqLGyOJNy6hPz+/P7+/gAAAAAAAAAAAAAAAAR4cEkpqr0zU2G675W2DeRnKEqYCYPpgitZKq8hrFeua0Di/0AfQNQLGoc8FAoRCCCUCmSmmGD6nD/phBoAdoWiBaATMDTNHe3UZ01gE+rtYc50zg9xybhmGBIWf1M1SASFBQULh1RBUn+Hj4tAcY96AJaXeYlhmxIRADs=" />
PNG图标:
<link rel="icon" type="image/png" href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABcAAAAWCAIAAACkFJBSAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAADPSURBVDhPzdDNCoJAFAXgec7WRS/gomW2aiNE+/7N0sqyLBCKLLNeq5lGpuEOjXFnUZeDoN75OEqCx8E8f65UlGl12mAHhPj3PXhEj4Hbar2mh5gCIFUZJIEeIvM8BpCq0Kse+kqRR34l8lYE9GmVRqcA6HfKLNsBCKvcGGSkeNeIKwLCKNNLBOogFS/bynUwyuQcFnUkRTPgPE+h0Doc4h8FlkpDhselDCGVfuKPTys3XYsfhFG6ix6FRq9GbrphUB6DpdKQpmU1HNsojv0En5X5p/+vZ6gAAAAASUVORK5CYII=" />
.ico 文件:
<link rel="shortcut icon" href="http://www.iconarchive.com/download/i94886/martin-berube/people/lady.ico" type="image/x-icon" />