Download Google Chrome Taskbar
According to the members, you cannot cannot disable this Microsoft Windows feature (in the Windows settings at least). The program gets to control this in the same way that the program gets to control the name of it's title bar. If the program tells the taskbar to show progress, the Taskbar will obey. This means that if Google Chrome were to provide an 'off switch' for this feature, then this would totally be possible; 'if the program tells the taskbar to show progress, the Taskbar will obey', therefore it the program (Google Chrome) tells the taskbar not to show the progress, then the taskbar will obey (and not show the progress). In the, people have already decided to discuss the issue and have gotten nowhere. Despite the old forum timeline, Google still has not implemented a solution to disable it. From my research, this is not possible.
Get Chrome Icon On Taskbar
Sorry for the bad news.
Though not required, we recommend you pin the Cast button to your Chrome toolbar. This will allow for easier access to Cast functionality from any web page. To pin the Cast button to the Chrome toolbar,. In the upper right corner of Chrome browser, click the Chrome Settings menu 'Cast.' . The Cast button will temporarily appear in your toolbar.
Download Firefox
To keep it there permanently, right-click on the Cast button and click “Always show icon.' If the Cast button is already pinned to your toolbar on your browser, you'll see the Cast button in the Chrome toolbar (near the top right).