I'm not sure if this is a duplicate ticket/issue. But, in FF/Safari the column headers seem to be wider than Chrome/Chromium. Removing the checkbox column has no effect.
Column headers in Chrome/Chromium:
Notice how the column's header width matches the column content...
Column headers in FF/Safari:
Notice how every column is at least 8px wider.
I found this 8px discrepancy while comparing all bwu-datagrid-header-column's style attribute. In there you'll see a "width: #px" that is 8px wider.
I'm not sure if this is a duplicate ticket/issue. But, in FF/Safari the column headers seem to be wider than Chrome/Chromium. Removing the checkbox column has no effect.
Column headers in Chrome/Chromium: Notice how the column's header width matches the column content...
Column headers in FF/Safari: Notice how every column is at least 8px wider.
I found this 8px discrepancy while comparing all bwu-datagrid-header-column's style attribute. In there you'll see a "width: #px" that is 8px wider.
Testing enviroment: OSX 10.11.5 SDK: 1.15.0 Firefox: 46.0.1 Safari: 9.1.1 (11601.6.17) Chrome: 50.0.2661.102 (64-bit) web_components: ^0.12.0 polymer_elements: ^1.0.0-rc.8 browser: ^0.10.0 polymer: ^1.0.0-rc.16