[component/firefox] Let's use newer firefox(68.0.2esr) and geckodriver(0.24.0).

component/firefox/buildout.cfg

@@ -73,9 +73,9 @@ part = ${firefox-51:location}
 
 [firefox-60]
 <= firefox-download
-version = 60.0.2esr
-i686-md5sum = ce7c80716036dfb5c2fb1ca2538556ff
-x86_64-md5sum = 6fe25d9a3fcc82670320242c9047d1da
+version = 68.0.2esr
+i686-md5sum = eaa9e0246eb2a31ccf55c100dc2edd5a
+x86_64-md5sum = d22dc17ce0949cdff78009afca6f2043
 
 [firefox-52]
 <= firefox-download
@@ -153,7 +153,13 @@ script =
 
 [geckodriver]
 # Current geckodriver installed as ${buildout:bin-directory}/geckodriver
-<= geckodriver-0.17.0
+<= geckodriver-0.24.0
+
+[geckodriver-0.24.0]
+<= geckodriver-base
+version = 0.24.0
+i686-md5sum = b88eee754f6c90b01f760f7a453dda95
+x86_64-md5sum = 7552b85e43973c84763e212af7cca566
 
 [geckodriver-0.22.0]
 <= geckodriver-base