diff --git a/public/index.html b/public/index.html
index 8b8b89c..e415752 100644
--- a/public/index.html
+++ b/public/index.html
@@ -71,6 +71,8 @@
     <script src="/script/external/katex-auto-render.min.js"></script>
     <script src="/script/external/notebook.min.js"></script>
 
+    <!-- Anonymous GitHub scripts -->
+    <script src="/script/utils.js"></script>
     <script src="/script/ng-pdfviewer.min.js"></script>
     <script src="/script/app.js"></script>
   </head>
diff --git a/public/script/app.js b/public/script/app.js
index a71f6df..062561a 100644
--- a/public/script/app.js
+++ b/public/script/app.js
@@ -671,6 +671,7 @@ angular
       $scope.terms = "";
       $scope.defaultTerms = "";
       $scope.branches = [];
+      $scope.repositories = [];
       $scope.source = {
         type: "GitHubDownload",
         branch: "",
@@ -709,6 +710,7 @@ angular
           if (cb) cb();
         });
       }
+
       getDefault(() => {
         if ($routeParams.repoId && $routeParams.repoId != "") {
           $scope.isUpdate = true;
@@ -753,8 +755,6 @@ angular
         }
       });
 
-      $scope.repositories = [];
-
       $scope.getRepositories = (force) => {
         $http
           .get("/api/user/all_repositories", {
@@ -798,46 +798,6 @@ angular
       };
       $('[data-toggle="tooltip"]').tooltip();
 
-      $scope.$watch("source.branch", async (v) => {
-        const selected = $scope.branches.filter(
-          (f) => f.name == $scope.source.branch
-        )[0];
-        if ($scope.details && $scope.details.hasPage) {
-          $scope.anonymize.page.$$element[0].disabled = false;
-          if ($scope.details.pageSource.branch != $scope.source.branch) {
-            $scope.anonymize.page.$$element[0].disabled = true;
-          }
-        }
-
-        if (selected) {
-          $scope.source.commit = selected.commit;
-          $scope.readme = selected.readme;
-          await getReadme();
-          anonymize();
-          $scope.$apply();
-        }
-      });
-
-      $scope.$watch("options.mode", (v) => {
-        if (v == "GitHubStream") {
-          $scope.options.page = false;
-          $scope.anonymize.page.$$element[0].disabled = true;
-        } else {
-          $scope.anonymize.page.$$element[0].disabled = false;
-        }
-      });
-
-      function parseGithubUrl(url) {
-        var matches = url.match(/.*?github.com\/([\w-\._]+)\/([\w-\._]+)/);
-        if (matches && matches.length == 3) {
-          return {
-            owner: matches[1],
-            repo: matches[2],
-          };
-        } else {
-          throw "Invalid url";
-        }
-      }
       $scope.getBranches = async (force) => {
         const o = parseGithubUrl($scope.repoUrl);
         const branches = await $http.get(
@@ -857,14 +817,7 @@ angular
         }
         $scope.$apply();
       };
-      function generateRandomId(length) {
-        const alphabet = "ABCDEF0123456789";
-        let output = "";
-        for (let index = 0; index < length; index++) {
-          output += alphabet[Math.round(Math.random() * (alphabet.length - 1))];
-        }
-        return output;
-      }
+
       async function getDetails() {
         const o = parseGithubUrl($scope.repoUrl);
         try {
@@ -962,7 +915,7 @@ angular
         }
 
         $scope.anonymize_readme = content;
-        let html = marked($scope.anonymize_readme);
+        const html = marked($scope.anonymize_readme);
         $scope.html_readme = $sce.trustAsHtml(html);
         setTimeout(Prism.highlightAll, 150);
       }
@@ -1026,13 +979,11 @@ angular
         };
       }
 
-      $scope.anonymizeRepo = async (event) => {
-        event.target.disabled = true;
+      async function sendRepo(url) {
         resetValidity();
-
         const newRepo = getRepo();
         try {
-          await $http.post("/api/repo/", newRepo, {
+          await $http.post(url, newRepo, {
             headers: { "Content-Type": "application/json" },
           });
           window.location.href = "/status/" + $scope.repoId;
@@ -1045,34 +996,54 @@ angular
           } else {
             console.error(error);
           }
-        } finally {
-          event.target.disabled = false;
         }
-        $scope.$apply();
+      }
+
+      $scope.anonymizeRepo = (event) => {
+        event.target.disabled = true;
+        sendRepo("/api/repo/").finally(() => {
+          event.target.disabled = false;
+          $scope.$apply();
+        });
       };
 
       $scope.updateRepo = async (event) => {
         event.target.disabled = true;
-        resetValidity();
-
-        const newRepo = getRepo();
-        try {
-          await $http.post("/api/repo/" + newRepo.repoId, newRepo, {
-            headers: { "Content-Type": "application/json" },
-          });
-          window.location.href = "/status/" + $scope.repoId;
-        } catch (error) {
-          if (error.data) {
-            displayErrorMessage(error.data.error);
-          } else {
-            console.error(error);
-          }
-        } finally {
+        sendRepo("/api/repo/" + $scope.repoId).finally(() => {
           event.target.disabled = false;
-        }
-        $scope.$apply();
+          $scope.$apply();
+        });
       };
 
+      $scope.$watch("source.branch", async (v) => {
+        const selected = $scope.branches.filter(
+          (f) => f.name == $scope.source.branch
+        )[0];
+        if ($scope.details && $scope.details.hasPage) {
+          $scope.anonymize.page.$$element[0].disabled = false;
+          if ($scope.details.pageSource.branch != $scope.source.branch) {
+            $scope.anonymize.page.$$element[0].disabled = true;
+          }
+        }
+
+        if (selected) {
+          $scope.source.commit = selected.commit;
+          $scope.readme = selected.readme;
+          await getReadme();
+          anonymize();
+          $scope.$apply();
+        }
+      });
+
+      $scope.$watch("source.type", (v) => {
+        if (v == "GitHubStream") {
+          $scope.options.page = false;
+          $scope.anonymize.page.$$element[0].disabled = true;
+        } else {
+          $scope.anonymize.page.$$element[0].disabled = false;
+        }
+      });
+
       $scope.$watch("terms", anonymize);
       $scope.$watch("options.image", anonymize);
       $scope.$watch("options.link", anonymize);
@@ -1206,7 +1177,7 @@ angular
               }
 
               if ($scope.type == "md") {
-                const md = res.data;
+                const md = contentAbs2Relative(res.data);
                 $scope.content = marked(md, { baseUrl: $location.url() });
                 $scope.type = "html";
               }
diff --git a/public/script/utils.js b/public/script/utils.js
new file mode 100644
index 0000000..ab87298
--- /dev/null
+++ b/public/script/utils.js
@@ -0,0 +1,104 @@
+function urlRel2abs(url) {
+  /* Only accept commonly trusted protocols:
+   * Only data-image URLs are accepted, Exotic flavours (escaped slash,
+   * html-entitied characters) are not supported to keep the function fast */
+  if (
+    /^(https?|file|ftps?|mailto|javascript|data:image\/[^;]{2,9};):/i.test(url)
+  ) {
+    return url; //Url is already absolute
+  }
+  var base_url = location.href.match(/^(.+)\/?(?:#.+)?$/)[0] + "/";
+  if (url.substring(0, 2) == "//") return location.protocol + url;
+  else if (url.charAt(0) == "/")
+    return location.protocol + "//" + location.host + url;
+  else if (url.substring(0, 2) == "./") url = "." + url;
+  else if (/^\s*$/.test(url)) return "";
+  //Empty = Return nothing
+  else url = "../" + url;
+
+  url = base_url + url;
+  var i = 0;
+  while (/\/\.\.\//.test((url = url.replace(/[^\/]+\/+\.\.\//g, ""))));
+
+  /* Escape certain characters to prevent XSS */
+  url = url
+    .replace(/\.$/, "")
+    .replace(/\/\./g, "")
+    .replace(/"/g, "%22")
+    .replace(/'/g, "%27")
+    .replace(/</g, "%3C")
+    .replace(/>/g, "%3E");
+  return url;
+}
+
+const charactersAttributes = "[^-a-z0-9:._]";
+const allTagCharacters = "(?:[^>\"']*(?:\"[^\"]*\"|'[^']*'))*?[^>]*";
+
+function by(match, group1, group2, group3) {
+  /* Note that this function can also be used to remove links:
+   * return group1 + "javascript://" + group3; */
+  return group1 + urlRel2abs(group2) + group3;
+}
+
+function cr(html, selector, attribute) {
+  if (typeof selector == "string") selector = new RegExp(selector, "gi");
+  attribute = charactersAttributes + attribute;
+  const marker = "\\s*=\\s*";
+  const end = ")(";
+  var re1 = new RegExp("(" + attribute + marker + '")([^"]+)()', "gi");
+  var re2 = new RegExp("(" + attribute + marker + "')([^']+)()", "gi");
+  var re3 = new RegExp(
+    "(" + attribute + marker + ")([^\"'][^\\s>]*" + end + ")",
+    "gi"
+  );
+  html = html.replace(selector, function (match) {
+    return match.replace(re1, by).replace(re2, by).replace(re3, by);
+  });
+  return html;
+}
+
+function contentAbs2Relative(content) {
+  if (!content) return content;
+  content = cr(
+    content,
+    "<" +
+      allTagCharacters +
+      charactersAttributes +
+      "href\\s*=" +
+      allTagCharacters +
+      ">",
+    "href"
+  );
+  content = cr(
+    content,
+    "<" +
+      allTagCharacters +
+      charactersAttributes +
+      "src\\s*=" +
+      allTagCharacters +
+      ">",
+    "src"
+  );
+  return content;
+}
+
+function generateRandomId(length) {
+  const alphabet = "ABCDEF0123456789";
+  let output = "";
+  for (let index = 0; index < length; index++) {
+    output += alphabet[Math.round(Math.random() * (alphabet.length - 1))];
+  }
+  return output;
+}
+
+function parseGithubUrl(url) {
+  var matches = url.match(/.*?github.com\/([\w-\._]+)\/([\w-\._]+)/);
+  if (matches && matches.length == 3) {
+    return {
+      owner: matches[1],
+      repo: matches[2],
+    };
+  } else {
+    throw "Invalid url";
+  }
+}