There are tons of applications in the Google Play store that can help you with the import. You may also find that the different browsers will have settings enclosed within for importing bookmarks.
Maybe someone else can recommend a specific application for you to try.
I've been utilizing this method for years (not the original thread, just a recent occurrence):
Browser Bookmark Import/Export
I don't want my bookmarks synced to my Google account, through Chrome (Chrome to Phone), or any other application. So I keep an html file of my current bookmarks on my MicroSD card.
Using the 'file:///...' command in the stock internet browser allows me to locally open the file on the card and view all my bookmarks without having to import them into multiple applications or have to utilize some unnecessary 3rd party software.
Every month or so I manually replace the file on my phone with the new file manually exported from my PC that contains all the old links plus the new or recent links - it also functions as a master rolling back up.
I keep only one bookmark on my mobile, to 'file:///...', that contains all my bookmarks. I think it is slick and works well for me.
Your requirements/results may vary