Level 134 pretty much flips around your expectations of blocks and fire on boards.
You have a high enough quota of colored dots to clear that you can’t spend too much focus containing the fire. Keep it at bay, but don’t pass up moves that will clear a lot of dots (especially squares), even if taking them mean that the fire will spread a little.
Clear the line at the top first.
From there, work down a side, opening up blocks containing one fire square at a time, trying to keep the number of spreading fire sources to one connected set at a time.
Again, contain the fire, but don’t pass up aggressive clearing moves. Go for those first.