PolkadotJS: clarify on cross-device functionality

community-contributions/miscellaneous_reports/Polkadot JS Extension.md

@@ -6,6 +6,9 @@ The minimal password length is 6 characters while Pioneer has no restrictions.
 
 Cross-chain keys have been tested with https://testnet.joystream.org and https://polkadot.js.org.
 
+According to the [extension repository there is no `cross-device` functionality](https://github.com/polkadot-js/extension/search?q=cross+device).
+It doesn't appear to sync with remote browser profiles and users have to re-import keys for every browser / device separatedly.
+
 ## Android
 
 Browser | Google | Brave | Tor Browser
@@ -21,13 +24,14 @@ Browser | Firefox | Tor Browser | Chrome | Chromium
 -- | -- | -- | -- | --
 Installable | Yes | Yes | Yes | Yes
 Cross-chain keys | Yes | Yes | Yes | Yes
-Add via JSON file | Yes | Yes | Yes | Yes
-Import raw seed, mnemonic | Yes | Yes | Yes | Yes
-Create new seed | Yes | Yes | Yes | Yes
-Backup seeds and or JSON file | Yes | Yes | Yes | Yes
+Can you import raw seeds, mnemonic seeds and/or jsons | Yes | Yes | Yes | Yes
+Can you create new seeds and or jsons | Yes | Yes | Yes | Yes
+Can you export seeds and or jsons | Yes | Yes | Yes | Yes
 
 ## MacOS / iOS
 
+Not supported.
+
 No extension available for download, but developers can build it themselves (see polkadot-js/extension#377 and [A Change to the Safari Extension](http://blog.lastpass.com/2019/01/change-safari-extension/), January 2019).
 
 ## Windows
@@ -36,7 +40,6 @@ Browser | Brave | Chrome | Edge | Firefox | Opera | Tor Browser
 -- | -- | -- | -- | -- | -- | --
 Installable | Yes | Yes | Yes | Yes | Yes | Yes
 Cross-chain keys | Yes | Yes | Yes | Yes | Yes | Yes
-Add via JSON file | Yes | Yes | Yes | Yes | Yes | Yes
-Import raw seed, mnemonic | Yes | Yes | Yes | Yes | Yes | Yes
-Backup seeds and/or JSON file | Yes | Yes | Yes | Yes | Yes | Yes
-
+Can you import raw seeds, mnemonic seeds and/or jsons | Yes | Yes | Yes | Yes | Yes | Yes
+Can you create new seeds and or jsons | Yes | Yes | Yes | Yes | Yes | Yes
+Can you export seeds and or jsons | Yes | Yes | Yes | Yes | Yes | Yes