Harper in Firefox Through SpellBolt

We de­signed Harper to be the ul­ti­mately portable gram­mar checker, but we’re still work­ing on liv­ing up to that promise. As the Harper Chrome ex­ten­sion be­comes more ca­pa­ble day-by-day, it has one crit­i­cal weak­ness: it does­n’t sup­port Firefox. Since Chrome has a much larger mar­ket share, it is­n’t a pri­or­ity at the mo­ment (although we ac­cept con­tri­bu­tions).

This is a won­der­ful ex­am­ple of where the open-source na­ture of the Harper’s core en­gine re­ally shines. Some­one has taken harper.js and put it into their own ex­ten­sion. SpellBolt is a Firefox ex­ten­sion that de­liv­ers Harper’s fan­tas­tic gram­mar check­ing straight into your Firefox browser. My ini­tial test­ing shows that it’s a solid ex­ten­sion.

I am de­lighted to see peo­ple mak­ing use of the plug­gable ar­chi­tec­ture Harper has adopted, and I can’t wait to see what SpellBolt does next.