(PLEASE FOR SOMEONTE IS IN THIS SAME SITUATION, FOR YOUR SAFETY DON'T REPEAT THIS PROCEDURE UNLESS YOU KNOW WHAT YOU ARE DOING) Hello everyone how are you people doing? I'm in serious trouble in my browser, regarding to recovery of my History. My operating system is Windows 7 Ultimate (64-bit). When I go to this site "https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile" I realize that the places.sqlite file is where contains all my bookmarks, downloads and my browsing history. What happened is that I copied the files "places.sqlite (30 MB)", "places.sqlite-shm (32KB)", "places.sqlite-wal (1.15 MB)" inside the folder enolq5l7.default to a New Folder and pasted them. Then I took the files containing these same names from an another place where I had saved my old History, and I pasted them into the enolq5l7.default folder. Then it replaced those that had already inside this folder. I opened Firefox browser and when I went to see my history, were all there, the pages on which I accessed at 6 months ago. So far, so good! Next, I took the files "places.sqlite (30 MB)", "places.sqlite-shm (32KB)", "places.sqlite-wal (1.15 MB)" from the New Folder, and I copied them and pasted them within the enolq5l7.default folder replacing files that already had in it. I realized that when I put them there, after opening the browser, automatically it has made changes in the files within the folder enolq5l7.default including these same files in which "places.sqlite" from 30MB became 10MB, "places.sqlite-shm" continued 32KB and "places.sqlite-wal" from 1.15 MB became 97KB, in other words, Firefox seemed to not recognize "places.sqlite (30 MB)", "places.sqlite-shm (32KB)", "places.sqlite-wal (1.15 MB) ", automatically undoing the changes every time I opened the browser. The previous session didn't return and the page that appeared when I opened the browser returned back to the defaults. I tried to go in http://kb.mozillazine.org/Bookmarks_history_and_toolbar_buttons_not_working_-_Firefox site, but I'm not sure what actually is occurring if the "places.sqlite" seems to be blocked or damaged, I believe that is only blocked because I tried it """If you have a recent profile backup, another possible solution is to remove the "places.sqlite" file (and any other files named "places.sqlite*", e.g., "places.sqlite-journal", if found) from the Firefox profile folder and replace it with the "places.sqlite" backup file.""" (obviously what I did before) but it didn't worked. I downloaded this addon Places-Maintenance, I clicked execute, restarted Firefox, but nothing worked. In the "Rebuild Places database" tab advises to me simply rename or delete "places.sqlite" but says that I'll lose all my History. That's not my intention! I tried to go to the Windows CHKDSK tool and nothing. What I really 'd like a(some) possible(s) solution(s) to make "places.sqlite (30 MB)", "places.sqlite-shm (32KB)", "places.sqlite-wal (1.15 MB)" be recognized by the browser, retrieving and viewing on the library from my all lost Firefox data, and an advice, if possible from anyone who is interested, so that in future I can get Backup of my history and retrieve it without subsequent errors. I Appreciate by the attention of everyone and understanding. Respects, Souza.