Prevent duplicate tabs effortlessly.

Latest Version

Version
1.4.5
Update
September 21, 2024
Size
273KiB
Developer
justinreinhart.com
Category
Users
2,000+
Rating
3.55102 ★
Manifest Version
3
Web Store Status
Languages Support
English
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Permissions
Tabs
Storage
Notifications
ContextMenus
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Duplicate Tab Helper Extension

Duplicate Tab Helper prevents the opening of duplicate URLs at the moment new tabs are opened. If an exact duplicate is found, the newer tab will be replaced with the existing tab as seamlessly as possible. The effect is so subtle you may not even notice it happening. Duplicate Tab Helper is FANTASTIC for doing research and quietly makes your browsing experience more enjoyable.

Unlike other extensions, great care is taken to make sure that when a duplicate is detected and discarded that it doesn't contain unsaved information. There is literally zero instances where this extension discards an old tab that you might have been using (unless you change your preferences.) Sometimes this means a few duplicates are ignored under specific circumstances. In cases of uncertainty, caution is favored over cleanup.

Tips:
* You can still create a duplicate. Right-click any page and select 'Duplicate this tab'.

* Duplicate Tab Helper is not intended for web developers who frequently need new tabs to replace the old tabs each time they make a change. I love you guys and gals but this extension will drive you crazy. :)

Best,
Justin

Please note there are some recommendations (ads) in the options screen to help you support my work.

*** RELEASE NOTES ***
2024-09-20
1.4.5
Fixed: Stability while overhauling to Manifest 3
Fixed: Disappearing context menus on right-click
Fixed: Total duplicate count not always syncing

1.4.4 Fixed: Duplicates are no longer matched between incognito and non-incognito ecosystems. This only became an issue when the \"all windows\" search feature was introduced in 1.4.2.

1.4.3 Tightened up duplicate disposal to only dispose of duplicate after active tab has been set. This is to (hopefully) address a rare bug when opening new blank tabs where focus was not properly put on the remaining tab.

1.4.2 Added option to search all windows for duplicates. No longer checks for duplicates in pinned tabs or in non-\"normal\" windows such as \"popup\", \"panel\", \"app\", or \"devtools\". If catching duplicates in these window types is desired please send an email and let me know some specifics.

1.4.1 Under default settings, instead of ignoring \"navigation duplicates\", duplicates are pulled forward to the same position as the active tab, but no tabs are removed.

1.4.0 Customization options added for how to deal with \"navigation duplicates\"

2019-06-17 Update 1.3.9: Can now detect duplicate URLs with a hash (#) character in them. Also if you open a blank tab and happen to type a URL that is already open into a BLANK TAB then the duplicate will be matched and handled.

2019-06-16 Update 1.3.7: Disabled notifications. On Windows 10 they are put into a notification center and must be manually dismissed. That's way too much clutter, so I disabled them. Thanks for trying them out.

2019-06-16 Update 1.3.6: Support added for bounced URLs! But only if the tab was opened in the background. I think this is a nice compromise to keep the extension lightweight but still very effective.

2019-06-15 Update: Right-click menu has a 'Duplicate' option in case user really does want a duplicate.
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Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "name": "Duplicate Tab Helper", "version": "1.4.5", "manifest_version": 3, "icons": { "19": "img/dth-icon-19.png", "48": "img/dth-icon-48.png", "128": "img/dth-icon-128.png" }, "description": "Prevent duplicate tabs effortlessly.", "options_page": "options.html", "permissions": [ "tabs", "storage", "notifications", "contextMenus" ], "web_accessible_resources": [ { "resources": [ "img/*", "css/*", "js/*", "html/*" ], "matches": [""] } ], "action": { "default_icon": "img/dth-icon-128.png", "default_title": "Duplicate Tab Helper" }, "background": { "service_worker": "js/background.js" }}
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How to download and manually install Duplicate Tab Helper extension for Chrome

Looking for a way to install Duplicate Tab Helper extensions for Chrome, you can search for them in the Chrome Web Store, clicking the "Add to Chrome" button, and following the straightforward process.

However, you may need to install Duplicate Tab Helper extensions manually, this article outlines two simple methods to effortlessly install Duplicate Tab Helper extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download Duplicate Tab Helper extension and manually install through Drag &Drop

If you ever need to manually install a Duplicate Tab Helper extension for Chrome, don't worry, it's a simple process. Just follow these easy steps, and you will have your extension ready to use in no time.

Step 1: Download the Duplicate Tab Helper Extension by clicking the "Download CRX" button on the website.

Look for the Duplicate Tab Helper extension you wish to install. Go to the website and download the Duplicate Tab Helper extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for Duplicate Tab Helper extension that contains all the data.

Step 2: Extract &Arrange Files

Once the file is downloaded, extract that file into its own folder. Similarly, give that extension files a permanent home. In other words, keep it in a folder that you don't accidentally delete it because these files will be needed to make that extension work.

Step 3: Go to the Chrome Extensions Page

Open Google Chrome and in the address bar, type chrome://extensions; it will open the Google Chrome extensions page. Make sure that "My extensions" is selected in the sidebar.

Step 4: Drag and Drop the Extension

Now, go to the folder where you extracted the Duplicate Tab Helper extension and drag &drop the extension file from there anywhere onto the extension page within Google Chrome.

Step 5: Complete the Installation

Once you drag and drop the extension file, follow the steps that Google Chrome takes you through. Similarly, if the extension file is of .crx file format, you will be required to review the permissions and then add the extension.

Now, you can manage that added extension as you would like to with any other Chrome extension that you added through Chrome Webstore. Its icon will also appear in the Google Chrome Menu on the right side of the address bar once you activate it.

Method 2: Download Duplicate Tab Helper extension for Chrome and install in Developer Mode

This is another method to install Duplicate Tab Helper extension manually, but the twist is that here, you install by enabling the developer mode option provided in Google Chrome. This mode is commonly used for testing extensions or running unpublished tools.

Step 1: Download the Duplicate Tab Helper extension file

Select and download the Duplicate Tab Helper extension by clicking the 'Download CRX' button on the website.

Step 2: Extract the downloaded contents

Convert the file to a ZIP file if it is in CRX format then extract the Duplicate Tab Helper extension zip file or folder that you downloaded. Make sure you extract it using the same folder name and keep it safely in another folder, so you don't delete it by mistake. The extracted folder will be needed to keep your Duplicate Tab Helper extension running.

Step 3: Open Chrome Extension Setting Page

In the address bar of Google Chrome, type chrome://extensions and open the Chrome Extension Page.

Step 4: Enable Developer Mode

After opening the Chrome Extension page, look at the top right side, and you will find the toggle option of "Developer mode."Simply enable that developer mode option.

Step 5: Load the Unpacked Extension

Once you enable the developer mode option, you will see the menu of Load Unpacked, Pack Extensions and Update. From that, select the option "Load unpacked."

Step 6: Select the Extension Folder

Once the pop-up opens upon clicking Load unpacked, select the Duplicate Tab Helper extension directory and click on the "Select Folder "button.

Step 7: Confirm and Install

After you select an extension folder of a Google Chrome extension you're installing manually, confirm its installation for the final time and let the installation complete.

Conclusion

Here we've made a step-by-step guide on How to manually install Duplicate Tab Helper extension in 2 ways. We hope this guide proves helpful.

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User reviews

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Allan Laal (ID: 0000007a787ad777) Voted 1 ★ - Updated 02/19/2023 does not work

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Oleg Shtyk (ID: 000000a9ca1b29d3) Voted 1 ★ - Updated 12/08/2022 не работает

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Christoph Rackwitz (ID: 000000c384681896) Voted 3 ★ - Updated 09/21/2022 stopped working recently... and no updates or any activity for this extension...

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Dmitry OD (ID: 00000068c59b08f9) Voted 1 ★ - Updated 01/26/2021 This app is doing more harm than good. Because when you open a copy of a tab, it is removed from the group. And you need to drag it to the group every time over and over and over again.

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Frances Cherman (ID: 0000007281ebf5fd) Voted 5 ★ - Updated 07/30/2020 I love this extension!