diff --git a/public/scripts/RossAscends-mods.js b/public/scripts/RossAscends-mods.js
index 5179cad62..d7f4025e0 100644
--- a/public/scripts/RossAscends-mods.js
+++ b/public/scripts/RossAscends-mods.js
@@ -1120,7 +1120,7 @@ export function initRossMods() {
                     const result = await Popup.show.confirm('Regenerate Message', 'Are you sure you want to regenerate the latest message?', {
                         customInputs: [{ id: 'regenerateWithCtrlEnter', label: 'Don\'t ask again' }],
                         onClose: (popup) => {
-                            regenerateWithCtrlEnter = popup.inputResults.get('regenerateWithCtrlEnter') ?? false;
+                            regenerateWithCtrlEnter = Boolean(popup.inputResults.get('regenerateWithCtrlEnter') ?? false);
                         },
                     });
                     if (!result) {
diff --git a/public/scripts/extensions.js b/public/scripts/extensions.js
index 5c22da7a0..92d1cb239 100644
--- a/public/scripts/extensions.js
+++ b/public/scripts/extensions.js
@@ -1061,7 +1061,7 @@ async function getExtensionVersion(extensionName, abortSignal) {
  * @param {boolean} global Is the extension global?
  * @returns {Promise<void>}
  */
-export async function installExtension(url, global) {
+export async function installExtension(url, global, branch = '') {
     console.debug('Extension installation started', url);
 
     toastr.info(t`Please wait...`, t`Installing extension`);
@@ -1072,6 +1072,7 @@ export async function installExtension(url, global) {
         body: JSON.stringify({
             url,
             global,
+            branch,
         }),
     });
 
@@ -1406,9 +1407,17 @@ export async function openThirdPartyExtensionMenu(suggestUrl = '') {
             await popup.complete(POPUP_RESULT.AFFIRMATIVE);
         },
     };
+    /** @type {import('./popup.js').CustomPopupInput} */
+    const branchNameInput = {
+        id: 'extension_branch_name',
+        label: t`Branch name (optional)`,
+        type: 'text',
+        tooltip: 'e.g. main, master, dev',
+    };
 
     const customButtons = isCurrentUserAdmin ? [installForAllButton] : [];
-    const popup = new Popup(html, POPUP_TYPE.INPUT, suggestUrl ?? '', { okButton, customButtons });
+    const customInputs = [branchNameInput];
+    const popup = new Popup(html, POPUP_TYPE.INPUT, suggestUrl ?? '', { okButton, customButtons, customInputs });
     const input = await popup.show();
 
     if (!input) {
@@ -1417,7 +1426,8 @@ export async function openThirdPartyExtensionMenu(suggestUrl = '') {
     }
 
     const url = String(input).trim();
-    await installExtension(url, global);
+    const branchName = String(popup.inputResults.get('extension_branch_name') ?? '').trim();
+    await installExtension(url, global, branchName);
 }
 
 export async function initExtensions() {
diff --git a/public/scripts/extensions/assets/index.js b/public/scripts/extensions/assets/index.js
index 014db82cd..c3e14fda4 100644
--- a/public/scripts/extensions/assets/index.js
+++ b/public/scripts/extensions/assets/index.js
@@ -291,7 +291,7 @@ async function installAsset(url, assetType, filename) {
     try {
         if (category === 'extension') {
             console.debug(DEBUG_PREFIX, 'Installing extension ', url);
-            await installExtension(url);
+            await installExtension(url, false);
             console.debug(DEBUG_PREFIX, 'Extension installed.');
             return;
         }
@@ -309,7 +309,7 @@ async function installAsset(url, assetType, filename) {
                 console.debug(DEBUG_PREFIX, 'Importing character ', filename);
                 const blob = await result.blob();
                 const file = new File([blob], filename, { type: blob.type });
-                await processDroppedFiles([file], true);
+                await processDroppedFiles([file]);
                 console.debug(DEBUG_PREFIX, 'Character downloaded.');
             }
         }
diff --git a/public/scripts/popup.js b/public/scripts/popup.js
index aaadce1b1..a41626740 100644
--- a/public/scripts/popup.js
+++ b/public/scripts/popup.js
@@ -71,7 +71,8 @@ export const POPUP_RESULT = {
  * @property {string} id - The id for the html element
  * @property {string} label - The label text for the input
  * @property {string?} [tooltip=null] - Optional tooltip icon displayed behind the label
- * @property {boolean?} [defaultState=false] - The default state when opening the popup (false if not set)
+ * @property {boolean|string|undefined} [defaultState=false] - The default state when opening the popup (false if not set)
+ * @property {string?} [type='checkbox'] - The type of the input (default is checkbox)
  */
 
 /**
@@ -157,7 +158,7 @@ export class Popup {
 
     /** @type {POPUP_RESULT|number} */ result;
     /** @type {any} */ value;
-    /** @type {Map<string,boolean>?} */ inputResults;
+    /** @type {Map<string,string|boolean>?} */ inputResults;
     /** @type {any} */ cropData;
 
     /** @type {HTMLElement} */ lastFocus;
@@ -260,28 +261,52 @@ export class Popup {
                 return;
             }
 
-            const label = document.createElement('label');
-            label.classList.add('checkbox_label', 'justifyCenter');
-            label.setAttribute('for', input.id);
-            const inputElement = document.createElement('input');
-            inputElement.type = 'checkbox';
-            inputElement.id = input.id;
-            inputElement.checked = input.defaultState ?? false;
-            label.appendChild(inputElement);
-            const labelText = document.createElement('span');
-            labelText.innerText = input.label;
-            labelText.dataset.i18n = input.label;
-            label.appendChild(labelText);
+            if (!input.type || input.type === 'checkbox') {
+                const label = document.createElement('label');
+                label.classList.add('checkbox_label', 'justifyCenter');
+                label.setAttribute('for', input.id);
+                const inputElement = document.createElement('input');
+                inputElement.type = 'checkbox';
+                inputElement.id = input.id;
+                inputElement.checked = Boolean(input.defaultState ?? false);
+                label.appendChild(inputElement);
+                const labelText = document.createElement('span');
+                labelText.innerText = input.label;
+                labelText.dataset.i18n = input.label;
+                label.appendChild(labelText);
 
-            if (input.tooltip) {
-                const tooltip = document.createElement('div');
-                tooltip.classList.add('fa-solid', 'fa-circle-info', 'opacity50p');
-                tooltip.title = input.tooltip;
-                tooltip.dataset.i18n = '[title]' + input.tooltip;
-                label.appendChild(tooltip);
+                if (input.tooltip) {
+                    const tooltip = document.createElement('div');
+                    tooltip.classList.add('fa-solid', 'fa-circle-info', 'opacity50p');
+                    tooltip.title = input.tooltip;
+                    tooltip.dataset.i18n = '[title]' + input.tooltip;
+                    label.appendChild(tooltip);
+                }
+
+                this.inputControls.appendChild(label);
             }
 
-            this.inputControls.appendChild(label);
+            if (input.type === 'text') {
+                const label = document.createElement('label');
+                label.classList.add('text_label', 'justifyCenter');
+                label.setAttribute('for', input.id);
+
+                const inputElement = document.createElement('input');
+                inputElement.classList.add('text_pole');
+                inputElement.type = 'text';
+                inputElement.id = input.id;
+                inputElement.value = String(input.defaultState ?? '');
+                inputElement.placeholder = input.tooltip ?? '';
+
+                const labelText = document.createElement('span');
+                labelText.innerText = input.label;
+                labelText.dataset.i18n = input.label;
+
+                label.appendChild(labelText);
+                label.appendChild(inputElement);
+
+                this.inputControls.appendChild(label);
+            }
         });
 
         // Set the default button class
@@ -529,7 +554,8 @@ export class Popup {
             this.inputResults = new Map(this.customInputs.map(input => {
                 /** @type {HTMLInputElement} */
                 const inputControl = this.dlg.querySelector(`#${input.id}`);
-                return [inputControl.id, inputControl.checked];
+                const value = input.type === 'text' ? inputControl.value : inputControl.checked;
+                return [inputControl.id, value];
             }));
         }
 
@@ -619,7 +645,7 @@ export class Popup {
         /** @readonly @type {Popup[]} Remember all popups */
         popups: [],
 
-        /** @type {{value: any, result: POPUP_RESULT|number?, inputResults: Map<string, boolean>?}?} Last popup result */
+        /** @type {{value: any, result: POPUP_RESULT|number?, inputResults: Map<string, string|boolean>?}?} Last popup result */
         lastResult: null,
 
         /** @returns {boolean} Checks if any modal popup dialog is open */
diff --git a/src/endpoints/extensions.js b/src/endpoints/extensions.js
index 2827d8058..cd8a31cd9 100644
--- a/src/endpoints/extensions.js
+++ b/src/endpoints/extensions.js
@@ -76,7 +76,7 @@ router.post('/install', async (request, response) => {
             fs.mkdirSync(PUBLIC_DIRECTORIES.globalExtensions);
         }
 
-        const { url, global } = request.body;
+        const { url, global, branch } = request.body;
 
         if (global && !request.user.profile.admin) {
             console.error(`User ${request.user.profile.handle} does not have permission to install global extensions.`);
@@ -90,8 +90,12 @@ router.post('/install', async (request, response) => {
             return response.status(409).send(`Directory already exists at ${extensionPath}`);
         }
 
-        await git.clone(url, extensionPath, { '--depth': 1 });
-        console.info(`Extension has been cloned at ${extensionPath}`);
+        const cloneOptions = { '--depth': 1 };
+        if (branch) {
+            cloneOptions['--branch'] = branch;
+        }
+        await git.clone(url, extensionPath, cloneOptions);
+        console.info(`Extension has been cloned to ${extensionPath} from ${url} at ${branch || '(default)'} branch`);
 
         const { version, author, display_name } = await getManifest(extensionPath);