robinodds This is the default effect of the <a> tag. You can temporarily remove this effect using the following custom css code. In addition, it is recommended that you add a second piece of css code to give visual feedback when the button is pressed.
It is not very convenient to modify this effect on the extension at the moment, please give me some time and I will solve this problem in the next major version update.
Hide <a> tag yellow/blue highlight effect ↓
.mobile-app-icon-bar a{
-webkit-tap-highlight-color:rgba(0,0,0,0);
-webkit-user-select: none;
-moz-user-focus: none;
-moz-user-select: none;
}
.mobile-app-icon-bar a:focus, .buttonstyle:focus{outline: none;}
Add button pressed effect ↓
.mobile-app-icon-bar .buttonstyle:active{
background: #5a5a5a; /* Change this color to whatever your like */
}