The current version is: 0.4.15
This is the SHA256 of the .crx file obtained from the Chrome store, as described in the Help document:
2aaa6de2f3af9828b66d197c05b1b40179c946af73273c90d64b5721803c5ac6
And this is the SHA256 of the .xpi file obtained from the Firefox store:
988a3810bbe57c531bc200608ac8bbbf4be1799c9ff7add28330592cc2717fca