Just thought I would expand on Ahmad's workaround.
As it is only icon-sprites that cause the slowdown, the quickest solution was to disable all icon-sprites with an AdblockPlus filter for bug.launchpad.net:
||bugs.launchpad.net/+icing/*/icon-sprites
However I wanted to still keep some of useful bug icons so instead I added the following to userContent.css in ~/.mozilla/firefox/*.default/chrome/ so that the most frequent but unnecessary icon-sprites were disabled.
Just thought I would expand on Ahmad's workaround.
As it is only icon-sprites that cause the slowdown, the quickest solution was to disable all icon-sprites with an AdblockPlus filter for bug.launchpad.net:
||bugs. launchpad. net/+icing/ */icon- sprites
However I wanted to still keep some of useful bug icons so instead I added the following to userContent.css in ~/.mozilla/ firefox/ *.default/ chrome/ so that the most frequent but unnecessary icon-sprites were disabled.
@-moz-document domain( bugs.launchpad. net) {
.person {background-image: none !important;}
.team {background-image: none !important;}
.add {background-image: none !important;}
.download-icon {background-image: none !important;}
.bug {background-image: none !important;}
}