EFDRC v6.21

1. Fix add-on not working on Anki with web engine older than Chromium 80 (#126)
2. Fix previewer sometimes not reloading

Known supported versions: 2.1.45+

EFDRC v6.20

1. Support editing in the preview window (#51)
2. Fix compatibility with other add-ons (#125)

Known supported versions: 2.1.50+
Known unsupported versions: -2.1.45

EFDRC v6.19

update gh release action version

EFDRC v6.18

Supports 2.1.45+

Known supported versions: 2.1.45+

EFDRC v6.17

Bump Version to v6.17

EFDRC v6.16

Bump Version to v6.16

EFDRC v6.15

Bump Version to v6.15

EFDRC v6.14

Bump Version to v6.14

EFDRC v6.13

Fixes #81

EFDRC v6.12

• Fix bug when pasting images from editor on 2.1.53+ (#79)
• Fix bug of ctrl key not working correctly