Remove invalid chars from UTM params on /firefox/accounts/features/ CTAs (Fixes #5870) (#5871)
Remove invalid chars from UTM params on /firefox/accounts/features/ CTAs (Fixes #5870) (#5871)


pascalchevrel/bedrock,sylvestre/bedrock,ericawright/bedrock,sgarrity/bedrock,ericawright/bedrock,hoosteeno/bedrock,flodolo/bedrock,craigcook/bedrock,alexgibson/bedrock,kyoshino/bedrock,hoosteeno/bedrock,mozilla/bedrock,alexgibson/bedrock,MichaelKohler/bedrock,sylvestre/bedrock,mozilla/bedrock,mozilla/bedrock,MichaelKohler/bedrock,flodolo/bedrock,ericawright/bedrock,sgarrity/bedrock,craigcook/bedrock,kyoshino/bedrock,MichaelKohler/bedrock,pascalchevrel/bedrock,flodolo/bedrock,flodolo/bedrock,sylvestre/bedrock,pascalchevrel/bedrock,MichaelKohler/bedrock,alexgibson/bedrock,pascalchevrel/bedrock,ericawright/bedrock,mozilla/bedrock,sylvestre/bedrock,hoosteeno/bedrock,craigcook/bedrock,alexgibson/bedrock,kyoshino/bedrock,craigcook/bedrock,sgarrity/bedrock,kyoshino/bedrock,sgarrity/bedrock,hoosteeno/bedrock