How to add HTML Code to Blog?
1 Log in to your blogger account and go to the dashboard.
2 Clik on the (Theme) section from the left hand menu.
3 Click on the (Edit HTML) button in the top-right corner of the page.
4 This will open the HTML editor for your theme. Look for the section where you want to add your HTML code. For example, if you want to add a code snippet to the header section, look for the "<head>" tag.
5 Paste your HTML code into the appropriate section of the code editor.
6 Click on the (save theme) button in the top right corner of the page to save your changes.
It is important to be careful when editing your Blogger themes HTML code as any slip-ups can make your blog break down. Make a point to take a reinforcement or duplicate of your theme's code prior to rolling out any improvements, and test your blog completely in the wake of rolling out any improvements.
Here is the HTML code to remove unwanted html tags (copy and paste it)
<script>/*<![CDATA[*/ var uri = window.location.toString();if (uri.indexOf("?m=1","?m=1") > 0) {var clean_uri = uri.substring(0, uri.indexOf("?m=1"));window.history.replaceState({}, document.title, clean_uri); }; /*]]>*/</script>