Yep , since we have (and use) fontawesome, maybe it's better to update glyphicon.less to use fontawesome …

I have a snippet for this : https://gitlab.com/snippets/1761726

Can you give a little more detail? I couldn't find any LimeSurvey docs on building the assets in the 'assets' directory.

assets system is same than Yii : we just copy css/js files without updating it.

Finally : you can just update bootstrap.css file

https://github.com/LimeSurvey/LimeSurvey/blob/5ef8669ceee8a171d0eedfa4793c0d40a9819edf/assets/packages/bootstrap/bootstrap.css#L266-L267

I don't understand what you mean by "asset system is same than Yii". Is there no build/packaging step in order to create bootstrap.css and bootstrap.min.css?

This diff below of assets/packages/bootstrap/bootstrap.css fixes the problem by changing the css so that it correctly resolves the glyphicon fonts (not using fontawesome) however it doesn't change the bootstrap.min.css file and seems like a hack. Is this what you want? Note the patch just adds a '../' to the font src references.

@@ -263,8 +263,8 @@ th {
@font-face {
font-family: 'Glyphicons Halflings';

• src: url('../fonts/glyphicons-halflings-regular.eot');
• src: url('../fonts/glyphicons-halflings-regular.eot?#iefix') format('embedded-opentype'), url('../fonts/glyphicons-halflings-regular.woff2') format('woff2'), url('../fonts/glyphicons-halflings-regular.woff') format('woff'), url('../fonts/glyphicons-halflings-regular.ttf') format('truetype'), url('../fonts/glyphicons-halflings-regular.svg#glyphicons_halflingsregular') format('svg');
• src: url('../../fonts/font-src/glyphicons-halflings-regular.eot');
• src: url('../../fonts/font-src/glyphicons-halflings-regular.eot?#iefix') format('embedded-opentype'), url('../../fonts/font-src/glyphicons-halflings-regular.woff2') format('woff2'), url('../../fonts/font-src/glyphicons-halflings-regular.woff') format('woff'), url('../../fonts/font-src/glyphicons-halflings-regular.ttf') format('truetype'), url('../../fonts/font-src/glyphicons-halflings-regular.svg#glyphicons_halflingsregular') format('svg');
  }
  .glyphicon {
  position: relative;

Sorry : i mean : personnaly i don't have the less file for current bootstrap.css : maybe LimeSurvey GMBH team have one …