First attempt at creating a first-run page

_locales/en/messages.json

 {
   "add": {
     "description": "This is the label for the 'Add' buttons.", 
     "message": "Add"
   }, 
   "add_domain_button": {
     "message": "Add domain"
   }, 
   "add_filter_button": {
     "message": "Add filter"
@@ skipping 87 matching lines @@
     "message": "Failed, not a valid filters list"
   }, 
   "filters_subscription_lastDownload_invalidURL": {
     "message": "Failed, not a valid address"
   }, 
   "filters_viewList_label": {
     "message": "View list"
   }, 
   "firstRun_acceptableAdsExplanation": {
     "description": "This is the explanation of the acceptable ads feature", 
-    "message": "<strong>Adblock Plus will always block annoying ads.</strong> But we don't want to hurt websites with plain and unobtrusive ads. That's why we have established <a>strict guidelines</a> to identify acceptable ads, and are not blocking these by default. You can always <a>disable</a> this if you don't want to see any ads at all."
+    "message": "<strong>Adblock Plus will always block annoying ads.</strong> Still, we want to encourage websites using plain and unobtrusive advertising. That's why we have established <a>strict guidelines</a> to identify acceptable ads, and allow these out of the box. You can always <a>disable</a> this if you want to block all ads."
   }, 
   "firstRun_changelog": {
     "description": "Page subtitle, links to the changelog", 
     "message": "See what's new"
   }, 
   "firstRun_feature_acceptableAds": {
     "description": "One of the bullet points in the features list", 
     "message": "Support websites with acceptable ads (more below)"
   }, 
   "firstRun_feature_betterSurfing": {
     "description": "One of the bullet points in the features list", 
     "message": "Enjoy the web without annoying ads"
   }, 
   "firstRun_feature_videoAds": {
     "description": "One of the bullet points in the features list", 
     "message": "Watch videos without commercial interruptions"
   }, 
   "firstRun_features_heading": {
     "description": "Text above the features list", 
     "message": "With Adblock Plus you can:"
   }, 
   "firstRun_share1": {
-    "description": "First line of text appearing above Facebook/Twitter buttons", 
-    "message": "Do you think Adblock Plus"
+    "description": "Text appearing above Facebook/Twitter buttons", 
+    "message": "Do you think Adblock Plus is worth sharing? Please do!"
   }, 
   "firstRun_share2": {
-    "description": "Second line of text appearing above Facebook/Twitter buttons", 
-    "message": "is worth sharing? Please do!"
-  }, 
-  "firstRun_share3": {
     "description": "Alternative text to appear above Facebook/Twitter buttons", 
     "message": "Adblock Plus is free and open source. Please support us:"
   }, 
-  "firstRun_share3_donate": {
+  "firstRun_share2_donate": {
     "description": "'Donate' button text", 
     "message": "Donate"
   }, 
-  "firstRun_share3_or": {
+  "firstRun_share2_or": {
     "description": "'or' as in 'donate or spread the word'", 
     "message": "or"
   }, 
   "firstRun_title_install": {
     "description": "This is the page heading on first installation", 
-    "message": "Adblock Plus has been installed."
+    "message": "Adblock Plus has been installed"
   }, 
   "firstRun_title_update": {
     "description": "This is the page heading on update", 
-    "message": "Adblock Plus has been updated."
+    "message": "Adblock Plus has been updated"
   }, 
   "found_a_bug": {
     "message": "Found a bug? Want to translate Adblock Plus into your language? Please <a href='$url$'>file a request here</a>.", 
     "placeholders": {
       "url": {
         "content": "$1"
       }
     }
   }, 
   "general": {
@@ skipping 62 matching lines @@
     "message": "Subscription title:"
   }, 
   "update_now": {
     "message": "Update now"
   }, 
   "whitelisted_domains": {
     "description": "This is a tab heading.", 
     "message": "Whitelisted domains"
   }
 }