Why is the size difference between the two versions(8.5 and 8.7) of firmware so huge？

[zlinuxboy]

hello, community

the size of Tos 8.5 is 219M, but the size of Tos 8.7 is just 93M.

```
-rw-r--r-- 1 root root 219M Jan 22 17:24 os8.5/working/Tos.img
-rw-r--r-- 1 root root 93M Jan 22 17:24 os8.7/working/Tos.img
```
What feature/function/package are missing on Tos 8.7, I don't have 8.6, might be the size was stripped down from 8.6.

[silvio]

They have changed the webview package. So the image file was smaller than before (for the first time).
BR Silvio