Mozilla Firefox is a trusted Web Browser and is compatible with most devices. However, the Couldn’t load XPCOM error message pops up now and then. The XPCOM is a cross-platform component model from the Mozilla Firefox, so the Cannot load XPCOM error disrupts the browsing. You may click on the OK button to close the error message, but you may not be able to use the Firefox app. The article addresses the error and the methods to resolve the XPCOM Firefox error are explained here.
How to Fix Mozilla Firefox Couldn’t Load XPCOM Error on Windows 10
The list of causes for which the XPCOM error occurs on Firefox is given in this section.
- Outdated Firefox- The outdated version of the Firefox app may cause this error.
- Corrupt Firefox User Profile- The User Profile on the Firefox Web Browser may be corrupt or may have malware sources.
- Third-party Extensions on Firefox- The issue with the XPCOM may arise if there are third-party extensions installed on the Firefox app.
- Corrupt System Files- The System files installed locally on your PC may have been corrupt or the PC may be infected with a virus.
方法一:基本故障排除方法
The first approach to solve the Couldn’t load XPCOM error is to try the basic troubleshooting methods listed in this section.
1. 重启电脑
There might be some glitches on your PC that prevent you from using the Firefox browser; you can restart your PC to fix the error. Press the Windows 键,单击 功率 button at the bottom-left corner, and click on the 重新启动 重新启动电脑的选项。
2。 检查Internet连接
An unstable Internet connection may hinder you from using the Firefox browser. You can check the speed of the connection using the 速度测试 and assess its quality.
- If the speed is low, try using any other Wi-Fi network for browsing on Firefox.
- Consider changing the data plan of the Internet Connection to a better plan.
3. Switch to Another Web Browser
If the XPCOM error with the Firefox Web Browser is still not resolved, you can try switching to another Web Browser like Google Chrome. Follow the steps below to switch to a different browser:
1。 发射 个人设置 按下 Windows + I键 在一起。
2。 点击 应用 设置。
3。 点击 默认应用 在左侧窗格上。
4. Scroll down and click on the current 的网络浏览器.
5. Choose from the option as per your preference.
另请参阅: 如何修复 Firefox 不加载页面的问题
4.删除临时文件
The numerous temporary files saved locally on your PC may have disrupted the browsing activity on Firefox. You can read the method to delete the temp files on your PC using the link given here.
5.修复损坏的文件
The files on your PC may be corrupt and have some issues which may cause the Couldn’t load XPCOM error. Read the article to repair system files on Windows 10 for corrupt files using the link provided here.
6.更新Windows
In most instances, using an outdated OS may cause issues on the PC; you need to update the Windows on your PC to the latest version to fix this error. Read the article on how to update Windows on your PC using the link given here.
7.运行Windows Update疑难解答
The issues with the Firefox browser can be cleared by using the Windows Troubleshooter on your PC. Read the method to run the Windows Troubleshooter using the link here and fix the error.
8. Disable Antivirus Temporarily (If Applicable)
The third-party security services on your PC may disrupt you from using the Firefox app; you can disable the anti-virus program to fix this error. Implement the steps given in the link here to disable the Anti-virus software on your PC.
9.执行系统还原
If the Firefox app performed better on the previous version of the Windows PC, you can try performing a System Restore on your PC to fix the error. The link which is given here will provide you with the method to perform a System Restore on your PC.
另请参阅: 修复 Firefox 上的连接不安全错误
Method 2: Run Firefox as Administrator
The Couldn’t load XPCOM error might appear if the Firefox is not granted the administrative permissions on your PC. You have to run the Firefox app as an Administrator on your Pc to fix the error.
1。 按 Windows键,类型 火狐 并点击 以管理员身份运行“ 选项。
Method 3: Update Firefox Browser
Using an outdated version of the Firefox Web Browser can be a reason for this error. Follow the steps below to update the Firefox app on your PC.
1.点击 Windows键,类型 火狐 并点击 可选.
2。 点击 打开应用程序菜单 button (indicated by the three horizontal lines) at the top-right corner of the home page and click on the 个人设置 显示列表上的选项。
3.在 其他咨询 标签,点击 检查更新 按钮在 Firefox更新 部分。
4.您将看到 Firefox is up to date message on the Firefox Updates section.
请注意: If there is an update for the Firefox browser, you will be prompted accordingly.
Method 4: Refresh Firefox Browser
To fix the Couldn’t load XPCOM error on the Firefox app, you can refresh Firefox entirely.
1。 启动 火狐 从应用程序 Windows搜索 酒吧。
2.接下来,点击 打开应用程序菜单 按钮,然后点击 政策和帮助 显示列表上的选项。
3。 点击 故障排除模式... ,在 火狐帮助 窗口。
4. 现在,单击 重新启动 上的按钮 在故障排除模式下重新启动 Firefox 弹出窗口。
5。 点击 刷新Firefox 上的按钮 Open Firefox in Troubleshoot Mode 确认窗口。
6.然后,单击 刷新Firefox 上的按钮 Refresh Firefox to its default settings 窗口。
7.最后,点击 完成 上的按钮 导入完成 window to Refresh Firefox completely.
另请参阅: 修复 Firefox 中找不到服务器的错误
Method 5: Disable Firefox Extensions
The extensions on the Firefox Web Browser can be a reason for the Couldn’t load XPCOM error. You can disable the extensions on the browser to fix the error.
1。 打开 Mozilla Firefox浏览器 从应用程序 Windows搜索 酒吧。
2。 点击 打开应用程序菜单 按钮,然后点击 政策和帮助 显示列表上的选项。
3. 现在,单击 故障排除模式... ,在 火狐帮助 窗口。
4。 点击 可选 上的按钮 在故障排除模式下重新启动 Firefox 弹出窗口。
5.接下来,点击 打开应用程序菜单 按钮,然后点击 附加组件和主题 列表中的选项。
6。 点击 扩展 tab on the left pane of the next window and toggle 折扣 the add-ons on the window.
7.然后,单击 三个水平点 button on the add-on and click on the 删除 按钮。
8。 点击 删除 button on the confirmation pop-up message window.
Method 6: Create New Firefox Profile
The current User Profile on the Firefox web browser may be corrupt; you can create a new User Profile to fix the Couldn’t load XPCOM error.
Step I: Import Saved Bookmarks
As a first step, you need to import the Bookmarks you have saved on the current User Profile to avoid any loss of data.
1。 打开 Mozilla的 火狐 应用程序。
2。 点击 打开应用程序菜单 按钮,然后点击 书签 显示列表中的选项。
3.在 书签 菜单,点击 管理书签 列表底部的选项。
4.在 自学资料库 屏幕,点击 导入和备份 button at the menu bar and click on the 将书签导出到HTML option in the drop-down menu displayed.
5.在 导出书签文件 window, browse and select a location, and click on the 保存 按钮保存书签文件。
Step II: Create New User Profile
This section will introduce the method to create a new User Profile on the Firefox app to fix the Couldn’t load XPCOM error.
1。 启动 火狐 浏览器应用程序。
2。 类型 关于:简介 in the URL address bar at the top and press the 输入 键打开 关于个人资料 窗口。
3。 点击 创建新的个人资料 窗口上的按钮。
4.接下来,点击 下一页 上的按钮 欢迎使用创建配置文件向导.
5. Type a name for the Profile in the 输入新的个人资料名称 字段,然后单击 完成 窗口中的按钮来创建配置文件。
请注意: 点击 Choose Folder… button to change the location for storing the User Profile name instead of the default location.
另请参阅: 修复 Firefox 已在运行的问题
方法三:重新安装火狐浏览器
The Firefox app installed on your PC might be corrupt or not properly installed. You can reinstall Firefox on your PC to fix the Couldn’t load XPCOM error.
Step I: Uninstall Firefox
The first step is to uninstall the existing version of the Firefox web browser on your PC using the Control Panel.
1。 按 Windows键,类型 控制面板 并点击 可选.
2. 单击选项 产品类别 ,在 通过查看 drop-down menu and click on the 卸载软件 在选项 训练课程 标题。
3。 选择 Mozilla Firefox(x64 en-US) in the list, click on the 卸载 按钮位于栏顶部,然后单击 Yes button on the UAC window.
4.然后,单击 下一页 按钮在 Mozilla Firefox 卸载 向导。
5.接下来,点击 卸载 button in the next window.
6。 点击 完成 button on the last window to completely uninstall the Firefox app.
7。 按 Windows+E 键 together to open the File Explorer and navigate to the This PC > Local Disk (C:) > Program Files > Mozilla Firefox 文件夹中。
8.右键单击 Mozilla Firefox浏览器 文件夹,然后单击 删除 option on the list to delete the files.
Step II: Reinstall Firefox
The next step to fix the Couldn’t load XPCOM error is to reinstall the Firefox Web Browser on your PC.
1.点击 Windows键,类型 谷歌Chrome浏览器 并点击 可选.
请注意: You can use any web browser to download the Firefox browser on your PC.
2.打开官方网站 火狐浏览器 on Google Chrome and click on the 下载Firefox 窗口上的按钮。
3. Double-click on the downloaded executable file 火狐安装程序.exe to run the installation file.
4. 等待安装过程完成。
5。 启动 火狐 Web Browser app on your PC.
另请参阅: 修复 Windows 10 上 Firefox 没有声音的问题
Method 8: Modify Tor Web Browser Settings
If you are using the Tor Web browser, in addition to Firefox, the issues on the Tor browser may cause the Couldn’t load XPCOM error. To fix this error, you can try checking for the issues on the Tor browser using Firefox to fix the error.
1。 打开 火狐 应用程序。
2。 点击 打开应用程序菜单 按钮,然后点击 个人设置 显示列表上的选项。
3.在 其他咨询 标签,点击 设置... 按钮在 网络设置 部分。
4。 选择 手动配置代理 选项 连接设置 窗口。
5。 类型 SOCKS Host: 127.0.0.1 Port: 9050 ,在 HTTP代理 字段中,键入 8080 ,在 港口 field, and click on the OK 按钮。
6. 然后输入 关于:配置 on the search bar of the Firefox browser and click on the 接受风险并继续 按钮。
7. Finally, type 网络.proxy.socks_remote_dns in the search bar and click on the 切换 button to set the type of the entry to be true.
8. 现在,输入 https://check.torptoject.org/ in the search bar on the Firefox browser and press the 输入 key to check the issues with the Tor Browser.
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