feat(drivers): add MediaFire driver support

- Add missing download method used

Closes 请求支持Mediafire #7869

Author: Da3zKi7

docs/guide/drivers/mediafire.md

@@ -90,3 +90,24 @@ Default is "/", because this driver roots to "myfiles", and then manages directo
 3. If you have AList running in a server or smartphone, you will likely do not have problems about the uggly session expiry, unless AList server get off.
 
 <br/>
+
+### **The default download method used**
+
+```mermaid
+---
+title: Which download method is used by default?
+---
+flowchart TB
+    style a1 fill:#bbf,stroke:#f66,stroke-width:2px,color:#fff
+    style a2 fill:#ff7575,stroke:#333,stroke-width:4px
+    subgraph ide1 [ ]
+    a1
+    end
+    a1[302]:::someclass====|default|a2[user equipment]
+    classDef someclass fill:#f96
+    c1[local proxy]-.alternative.->a2[user equipment]
+    b1[Download proxy URL]-.alternative.->a2[user equipment]
+    click a1 "../drivers/common.html#webdav-policy"
+    click b1 "../drivers/common.html#webdav-policy"
+    click c1 "../drivers/common.html#webdav-policy"
+```