Firefox used to do the infrequent large change thing, then moved to frequent small breakage. Specific to add-ons: every release has broken some and the XUL dep

Firefox used to do the infrequent large change thing, then moved to frequent small breakage. Specific to add-ons: every release has broken some and the XUL depreciation is to some extent to deal with that problem better. Note that users hate both options proposed in the article passionately, it just seems that break early break often results in fewer users voting with their feet.