fixup! Add TorStrings module for localization

Bug 41521: Improve localization notes

browser/locales/en-US/chrome/browser/aboutTBUpdate.dtd

 <!ENTITY aboutTBUpdate.changelogTitle "Tor Browser Changelog">
 <!ENTITY aboutTBUpdate.updated "Tor Browser has been updated.">
+<!-- LOCALIZATION NOTE: the following entities are used to create the link to
+  -  obtain more information about the latest update.
+  -  The markup on the page looks like this:
+  -  &aboutTBUpdate.linkPrefix;<a href="...">&aboutTBUpdate.linkLabel;</a>&aboutTBUpdate.linkSuffix;
+  -  So, linkPrefix is what precedes the link, linkLabel is the link itself,
+  -  and linkSuffix is a text after the link. -->
 <!ENTITY aboutTBUpdate.linkPrefix "For the most up-to-date information about this release, ">
 <!ENTITY aboutTBUpdate.linkLabel  "visit our website">
 <!ENTITY aboutTBUpdate.linkSuffix ".">

toolkit/torbutton/chrome/locale/en-US/aboutDialog.dtd

@@ -9,15 +9,15 @@
 <!ENTITY project.end             ", a nonprofit working to defend your privacy and freedom online.">
 
 <!ENTITY help.start              "Want to help? ">
-<!-- LOCALIZATION NOTE (help.donate): This is a link title that links to https://www.torproject.org/donate/donate.html.en -->
+<!-- LOCALIZATION NOTE (help.donate): This is a link title that links to https://donate.torproject.org/ -->
 <!ENTITY help.donateLink         "Donate">
 <!ENTITY help.or                 " or ">
-<!-- LOCALIZATION NOTE (help.getInvolvedLink): This is a link title that links to https://www.torproject.org/getinvolved/volunteer.html.en -->
+<!-- LOCALIZATION NOTE (help.getInvolvedLink): This is a link title that links to https://community.torproject.org/ -->
 <!ENTITY help.getInvolvedLink    "get involved">
 <!ENTITY help.end                "!">
-<!-- LOCALIZATION NOTE (bottom.questions): This is a link title that links to https://www.torproject.org/docs/trademark-faq.html.en -->
+<!-- LOCALIZATION NOTE (bottom.questions): This is a link title that links to https://support.torproject.org/ -->
 <!ENTITY bottomLinks.questions   "Questions?">
-<!-- LOCALIZATION NOTE (bottom.questions): This is a link title that links to https://www.torproject.org/getinvolved/relays -->
+<!-- LOCALIZATION NOTE (bottom.questions): This is a link title that links to https://community.torproject.org/relay/ -->
 <!ENTITY bottomLinks.grow        "Help the Tor Network Grow!">
 <!-- LOCALIZATION NOTE (bottom.questions): This is a link title that links to about:license -->
 <!ENTITY bottomLinks.license  "Licensing Information">

toolkit/torbutton/chrome/locale/en-US/onionLocation.properties

@@ -5,8 +5,12 @@
 
 # Onion-Location strings.
 onionLocation.alwaysPrioritize=Always Prioritize Onions
+# Localization note: this is the access key for "Always Prioritize Onions".
+# It should be a character that appears in that string.
 onionLocation.alwaysPrioritizeAccessKey=a
 onionLocation.notNow=Not Now
+# Localization note: this is the access key for "Not now".
+# It should be a character that appears in that string.
 onionLocation.notNowAccessKey=n
 onionLocation.description=There's a more private and secure version of this site available over the Tor network via onion services. Onion services help website publishers and their visitors defeat surveillance and censorship.
 onionLocation.tryThis=Try Onion Services