Adding removing blank target for browser links

web/react/utils/markdown.jsx

@@ -41,7 +41,7 @@ export class MattermostMarkdownRenderer extends marked.Renderer {
             output += ' title="' + title + '"';
         }
 
-        if (outHref.indexOf(Utils.getTeamURLFromAddressBar()) === 0) {
+        if (outHref.lastIndexOf(Utils.getTeamURLFromAddressBar()) === 0) {
             output += '>';
         } else {
             output += ' target="_blank">';

web/react/utils/text_formatting.jsx

@@ -96,8 +96,13 @@ function autolinkUrls(text, tokens) {
         const index = tokens.size;
         const alias = `MM_LINK${index}`;
 
+        var target = 'target="_blank"';
+        if (url.lastIndexOf(Utils.getTeamURLFromAddressBar()) === 0) {
+            target = '';
+        }
+
         tokens.set(alias, {
-            value: `<a class='theme' target='_blank' href='${url}'>${linkText}</a>`,
+            value: '<a class="theme"' + target + ' href="${url}">${linkText}</a>',
             originalText: linkText
         });