README: update screenshots, add note about regex flavours incompatibi…

…lity

README.md

@@ -3,9 +3,15 @@ Watch, blacklist, and see domain statistics directly from the FIRE popup!
 
 This userscript aims at making the watch/blacklist process easier for experienced users.
 
+## Note
+The script determines whether a domain is watched or blacklisted by testing it against all of the entries on the SmokeDetector's watchlists/blacklists. Since the script is written in JavaScript (therefore using the ECMAScript flavour) and SD utilises the [regex](https://pypi.org/project/regex) library (an implementation quite close to PCRE), there may be instances where a domain marked as not watched or blacklisted by the script actually matches a regular expression that exists in SD watchlist/blacklist, but is not compatible with the ECMAScript flavour.
+
 ## Screenshots
 
-![image](https://user-images.githubusercontent.com/38133098/137360217-b0665e90-3361-4b26-a5c7-2580b05f13b4.png)
+![eq1](https://github.com/userscripters/fire-extra-functionality/assets/38133098/bbfb79f7-9c92-4e53-85a3-5e811fed7aff)
+
+
+![eq2](https://github.com/userscripters/fire-extra-functionality/assets/38133098/26b7dd5c-1ed0-42ba-a745-ee256361b07a)
 
-![image](https://user-images.githubusercontent.com/38133098/137360669-db591d3c-a513-4918-9d1a-9e1408586d58.png)
 
+![eq3](https://github.com/userscripters/fire-extra-functionality/assets/38133098/b0a2638f-cd00-4bd1-942b-823a93b1d571)