add maxlength test
Merge pull request #1079 from patrickkettner/maxlength

add maxlength text
small fix for svg filter test
Merge pull request #1078 from patrickkettner/updated-svg-filter

small fix for svg filter test
fix syntax issue with polyfill.json
Added tests for transparent Webp images

Related issue #1023
Merge pull request #1024 from kristerkari/master

Added test for transparent Webp images
fix firefox bug in videoautoplay, ensure check happens after a tick