Open Specific websites in multiple tabs

Here is the list of methods you can follow to open multiple tabs or URLs

Pinned TabsChromeEdgeFirefox

You can use any of the methods, and what works best for you.

Pinned Tabs

One of the easy methods that work on all browsers is pinning the tabs you always want to open. Once done,e every time you open the browsers, all those tabs will automatically open

Open multiple Tabs in Chrome on launch

Open the Chrome browser and visit websites that you want to automatically open on the browser startup. Now, click on the menu icon on the right side and choose Settings. In the Settings tab, click on the On startup settings. You will have three options here—One the New Tab page,  Continue where you left off, and Open a specific page or set of pages. Select the radio button next to Open a specific page or set of pages. Next, you can add a new page or use current pages. You can see that all websites which were already opened in tabs, other than the Settings tab get added to the ‘Startup pages” dialog box. If you want to add another website, which was not currently opened, then manually add the website URL in the ‘Add a new page’ text box and hit Enter. Next, click “Ok” once you have added the required website URLs. To remove the added website from the startup dialog box, hover the mouse on the URL and click on the “X” mark shown on the right side.

Open specific websites in the Microsoft Edge browser

Launch Edge, and open the set of the pages you want to add as startup items. It will make it easy to add them instantly when you are at the settings page. Click on the three-dot horizontal menu and select settings from the menu. Then select Start Home and news tabs. You can also directly go to the page by typing edge://settings/startHomeNTP and pressing the Enter key. Under the When Microsoft Edge starts section, select Open these pages. The existing pages will be available, and you can choose to add a new page or use all open tabs.

Open specific websites in Firefox on every startup

Open Firefox, and click on the Hamburger Menu, and then select Settings. Next, switch to the Home section, and click on the dropdown next to Homepage and new Windows. Select Custom URL. The page will change, and now show you a text box where you can paste any URL, Use Current Page or Use Boomark to add the pages. Everything will be automatically saved. Read: How to save All Tabs or Pages as Bookmarks or Favorites.

How can I have two URLs open at the same time?

By right-clicking on the link and holding it, you can drag a box around it. You will be able to open all those links in new tabs when you release the right click on your mouse. The add-on opens links in new tabs by default, but you can change it to open in new windows.  Read more on it. How to set the default browser may also interest you.